Error Trouble Codes

Code C0200 means the brake (skid control) computer(ABS) detected abnormal voltage from the wheel speed sensor. It is most often caused by a failed wheel RF speed sensor, or connections to and from the wheel speed sensor and abs control module. This will cause the hybrid regen process to malfunction, and can cause damage to the hybrid battery with continued use of the vehicle without resolving the core issue.

Code C0205 means the brake (skid control) computer(ABS) detected abnormal voltage from the wheel speed sensor. It is most often caused by a failed wheel LF speed sensor, or connections to and from the wheel speed sensor and abs control module. This will cause the hybrid regen process to malfunction, and can cause damage to the hybrid battery with continued use of the vehicle without resolving the core issue.

Code C0210 means the brake (skid control) computer(ABS) detected abnormal voltage from the wheel speed sensor. It is most often caused by a failed wheel RR speed sensor, or connections to and from the wheel speed sensor and abs control module. This will cause the hybrid regen process to malfunction, and can cause damage to the hybrid battery with continued use of the vehicle without resolving the core issue.

Code C0215 means the brake (skid control) computer(ABS) detected abnormal voltage from the wheel speed sensor. It is most often caused by a failed wheel LR speed sensor, or connections to and from the wheel speed sensor and abs control module. This will cause the hybrid regen process to malfunction, and can cause damage to the hybrid battery with continued use of the vehicle without resolving the core issue.

Code C1241 means the brake (skid control) computer detected abnormal voltage in the power supply to the brake control system. It is a secondary code, primary codes should be resolved first. It is most often caused by a weak or discharged 12-volt battery, especially after repeated start attempts, but may also be caused by loose or corroded terminals, a poor ground, a blown fuse, damaged wiring, or a charging problem. It is not a hybrid battery code. The brake actuator or brake computer should only be replaced after power, ground, and the 12-volt battery have been verified.

Code C1252 is a brake booster pump code on Toyota and Lexus hybrids. Is a primary code. It indicates the brake booster pump motor is running longer than expected. It is a brake system issue, not a hybrid battery issue, and is different from the C1259 and C1310 codes, which are triggered by the hybrid system. Toyota has issued model-specific support programs covering brake booster pump repairs on certain hybrids.

Code C1253 is a brake booster pump code on Toyota and Lexus hybrids that points to the pump motor relay circuit. It is a primary code. It is a brake system issue, not a hybrid battery issue, and is different from the C1259 and C1310 codes, which are triggered by the hybrid system. Toyota has issued model-specific support programs covering brake booster pump repairs on certain hybrids.

Code C1256 is a brake booster code on Toyota and Lexus hybrids indicating low pressure in the brake accumulator. It is a primary code, it is a brake system issue, not a hybrid battery issue, and is different from the C1259 and C1310 codes, which are triggered by the hybrid system. Toyota has issued model-specific support programs covering brake booster repairs on certain hybrids.

Code C1259 is reported by the ABS module when it detects a regenerative-braking or high-voltage system malfunction. It commonly appears with a hybrid battery fault but is not directly caused by the hybrid battery. Diagnose any hybrid battery code first. If C1259 remains afterward, test the 12-volt battery; if the code still remains, professional diagnosis is required.

Code C1310 is reported by the ABS module when it receives a malfunction signal from the high-voltage system. It commonly appears with a hybrid battery fault but is not directly caused by the hybrid battery. Diagnose any hybrid battery code first. If C1310 remains afterward, test the 12-volt battery; if the code still remains, professional diagnosis is required.

Code C1391 is a brake booster code on Toyota and Lexus hybrids indicating an abnormal pressure leak in the brake accumulator system. It is a secondary code, all primary codes need to be resolved first. It is a brake system issue, not a hybrid battery issue, and is different from the C1259 and C1310 codes, which are triggered by the hybrid system. Toyota has issued model-specific support programs covering brake booster repairs on certain hybrids.

Code P0171 indicates that the engine is receiving too little fuel or too much air on Bank 1. Common causes include a vacuum leak, dirty or faulty mass airflow sensor, or low fuel pressure. The engine may run normally, run poorly, or stall depending on the cause. This code is not related to the hybrid battery. This is a primary code and can lead to hybrid battery failure.

Code P0172 indicates that the engine is receiving too much fuel or too little air on Bank 1. Possible causes include a dirty or faulty mass airflow sensor, fuel-pressure issue, or another air-fuel control problem. The engine may run normally, run poorly, or stall depending on the cause. This code is not related to the hybrid battery.

This code indicates that all hybrid battery voltage-sensing circuits are reporting an open circuit or battery-block voltage below 2.5 volts. The issue is usually in the connections between the battery blocks and the hybrid battery ECU or voltage sensor rather than in the individual battery modules.

Code P0420 indicates that the catalytic converter is not operating efficiently. Possible causes include a worn catalytic converter, faulty oxygen sensor, exhaust leak, or another engine-related condition. The vehicle may remain drivable initially, but delaying repairs can allow contaminants to build up and restrict the converter, which may eventually cause poor engine performance or stalling.

Code P0517 indicates a high-voltage reading from the 12-volt battery temperature-sensor circuit. If it appears immediately after a 12-volt battery replacement, the sensor or its connection may not have been reinstalled correctly. If it appears later, the sensor, wiring, or related components should be professionally diagnosed.

Code P0562 means a control module detected that the low-voltage (12-volt) electrical system dropped below the range needed for normal operation. It is a secondary code, if there are other codes, the primary code should be addressed first. On hybrids this refers to the 12-volt system, not the high-voltage hybrid battery. Common causes include a weak or discharged 12-volt battery, loose or corroded battery terminals or grounds, a parasitic draw, or a charging problem. On hybrid vehicles the 12-volt battery is charged by the DC/DC converter rather than an alternator.

Code P061B indicates a control module detected a problem with its internal torque calculation. On GM Two-Mode hybrids (Tahoe, Yukon, Escalade, Silverado, Sierra), GM has documented this code appearing together with P0BBD. When the two appear together, engine operation and hybrid battery state of charge should be evaluated before deciding the hybrid battery has failed. This code by itself is not a hybrid battery code.

Code P0886 indicates a low-voltage condition in the power relay control circuit for the transmission control module (TCM). “Low” refers to the electrical signal, not to low transmission fluid. It is not a hybrid battery code. Possible causes include a faulty TCM power relay, a blown fuse, damaged or corroded wiring or connectors, a poor ground, a weak 12-volt battery, or a charging problem. A faulty TCM should only be considered after the circuit has been checked.

This code indicates a problem with the DC/DC converter, which converts high-voltage power from the inverter into power for the 12-volt electrical system. When the converter is not operating correctly, the 12-volt battery may lose charge. On most hybrid vehicles, the converter is part of the inverter. On certain 2007–2011 Toyota Camry and Nissan Altima, 2006–2011 Lexus GS 450h, and 2009–2012 Lexus HS 250h models, it is part of the hybrid battery assembly.

This code indicates a fault in the hybrid high-voltage interlock circuit. Hybrid vehicles typically have interlocks at the hybrid battery, transmission, and inverter. The vehicle may not start if an interlock is installed incorrectly, has failed, or has a damaged mating connection. Professional diagnosis is recommended to identify the affected interlock.

Code P0A0F indicates that the hybrid control system commanded the engine to start, but the engine failed to run. The 12-volt battery and hybrid system must be operating well enough for the start command to occur. This is a primary engine-performance code and is not caused by the hybrid battery. Engine, fuel-delivery, throttle-body, mass-airflow, and related systems should be diagnosed first.

Code P0A1F indicates a fault involving the battery energy control module (BECM), also called the battery ECU on Toyota and Lexus vehicles. This module monitors the hybrid battery’s voltage, current, and temperature. Possible causes include an internal ECU fault, a problem with battery voltage monitoring, a power-supply or ground fault, damaged wiring or connectors, a communication problem, or abnormal data from another component in the battery assembly. On many vehicles the battery ECU is located inside or attached to the hybrid battery assembly.

Code P0A78 indicates that the high-voltage control module has detected a performance issue with the inverter assembly. The inverter converts direct current from the hybrid battery into three-phase alternating current to power the electric motor and transaxle. This code is not caused by the hybrid battery and requires professional diagnosis.

Code P0A7A indicates a performance issue involving the generator motor or inverter assembly. The inverter converts direct current from the hybrid battery into three-phase alternating current for the hybrid motor and transaxle. Professional diagnosis is recommended to identify the affected component.

Code P0A7F indicates deterioration of the hybrid battery pack. On Toyota hybrids, the hybrid battery is the cause in approximately 95% of cases. On Honda vehicles, the code may also involve the transmission, A/C compressor, or other components. The vehicle may remain drivable, but any no-start condition or additional codes should be diagnosed separately.

Code P0A80 indicates that one or more hybrid battery blocks differ in voltage by more than 1 volt, usually because a battery module is failing. The hybrid battery is the cause in approximately 90–95% of cases. On some 2010 and newer vehicles with a recently replaced hybrid battery, the hybrid powertrain control module or a loose negative connection at the 12-volt battery may also contribute. The vehicle may remain drivable, often in reduced-power (limp) mode. P0A80 is a primary code, but engine no-start codes such as P0A0F and inverter codes take priority because power flows from the engine through the inverter to the hybrid battery. An engine that repeatedly fails to start can place added strain on and potentially damage the hybrid battery. An inverter failure typically prevents the vehicle from starting or transferring power and only rarely damages the hybrid battery.

Code P0A82 indicates a performance problem with the hybrid battery cooling fan. The fan pulls cabin air through the hybrid battery to keep it from overheating. Possible causes include a failed or debris-clogged blower motor, a relay, fuse, or wiring problem, a blocked intake vent or duct, or a fan control issue. This code does not mean the hybrid battery has failed, but a battery that runs hot for long periods will wear out faster, so the cooling issue should be repaired promptly.

Code P0A90 indicates a performance issue with the drive motor (motor-generator) in the hybrid transaxle. It is not a hybrid battery voltage fault. The likely cause depends on the information (subset) code stored with it and may involve the motor-generator, the inverter, position sensors, wiring, or the transaxle. Professional diagnosis is recommended.

Code P0A93 indicates a performance problem in the inverter cooling system. It is not caused by the hybrid battery. The vehicle may remain drivable, but inadequate inverter cooling can disrupt normal charging and discharging and place additional stress on the hybrid battery. Prompt professional diagnosis is recommended.

Code P0A94 indicates that the inverter/converter assembly is not producing the expected power. In many cases, the vehicle will not start. If the vehicle does operate, continued driving may place additional stress on the hybrid battery. Professional diagnosis is recommended as soon as possible.

Code P0A95 indicates a problem with the high-voltage fuse. On many hybrids this fuse is located in the service plug (service disconnect) on the hybrid battery. The code is usually not caused by a failing hybrid battery. Possible causes include a blown high-voltage fuse, a service plug that is loose or not fully seated (common after battery work), or a related high-voltage connection problem. A blown high-voltage fuse usually has an underlying cause that also needs to be found.

This code indicates a problem with a hybrid battery temperature-sensor circuit. Hybrid batteries typically use three to six sensors to monitor cell temperature. Possible causes include a failed temperature sensor, wiring fault, powertrain control module, or an internal hybrid battery issue. The hybrid battery is the cause in approximately 90% of cases.

This code indicates a problem with a hybrid battery temperature-sensor circuit. Hybrid batteries typically use three to six sensors to monitor cell temperature. Possible causes include a failed temperature sensor, wiring fault, powertrain control module, or an internal hybrid battery issue. The hybrid battery is the cause in approximately 90% of cases.

This code indicates a problem with a hybrid battery temperature-sensor circuit. Hybrid batteries typically use three to six sensors to monitor cell temperature. Possible causes include a failed temperature sensor, wiring fault, powertrain control module, or an internal hybrid battery issue. The hybrid battery is the cause in approximately 90% of cases.

This code indicates a problem with a hybrid battery temperature-sensor circuit. Hybrid batteries typically use three to six sensors to monitor cell temperature. Possible causes include a failed temperature sensor, wiring fault, powertrain control module, or an internal hybrid battery issue. The hybrid battery is the cause in approximately 90% of cases.

Code P0AA6 indicates an electrical isolation fault between the vehicle’s high-voltage system and the low-voltage system or vehicle body. Depending on the vehicle, it may prevent the car from starting or shifting into Drive or Reverse. Possible sources include the hybrid battery, inverter, air-conditioning compressor, transmission, or ABS servo motor. Toyota subset codes help identify the likely source: 526 is general code emaning hybrid system and not indicative of a component or system, 611 points to the inverter or A/C compressor, 612 confirms the hybrid battery, 613 points to the transmission or inverter, and 614 may involve the transmission, inverter, or hybrid battery. Because this fault can involve several high-voltage components, diagnosis by a Toyota dealer or a Hybrid specialist repair shop is recommended. A weak 12-volt battery does not directly cause P0AA6, but electrical interference may cause a stored code to become active after a recent battery replacement.

This code indicates a problem with a hybrid battery air-temperature sensor circuit. Possible causes include a failed temperature sensor, wiring fault, powertrain control module, or an internal hybrid battery issue. The hybrid battery is the cause in approximately 90% of cases.

On applicable GM hybrid vehicles, code P0AB9 indicates that the hybrid control system commanded the engine to start, but the engine failed to run. This is a primary engine-performance code and is not caused by the hybrid battery. Engine, fuel-delivery, throttle-body, mass-airflow, and related systems should be diagnosed first.

This code indicates a fault in the hybrid battery current-sensor circuit. The issue is commonly associated with the voltage sensor, battery ECU, internal electronics, or the connection to the vehicle wiring harness. The hybrid battery is the cause in approximately 90% of cases. This is a primary code and should be addressed before related secondary codes.

This code indicates a fault in the hybrid battery pack current-sensor circuit. Possible causes include an internal relay, fuse, wire, or connector. In approximately 99% of cases, the issue is within the hybrid battery. This is a primary code and should be addressed before related secondary codes.

This code indicates a fault in the hybrid battery current-sensor circuit. The issue is commonly associated with the voltage sensor, battery ECU, internal electronics, or the connection to the vehicle wiring harness. The hybrid battery is the cause in approximately 90% of cases. This is a primary code and should be addressed before related secondary codes.

On GM hybrid vehicles, code P0AC4 means the hybrid powertrain control module has requested that the malfunction indicator light turn on. It does not identify a specific hybrid battery failure. Any other P, C, U, or B codes should be diagnosed first because they may identify the primary issue. If P0AC4 is the only code present, check the 12-volt battery, fluid levels, door and hood switches, ABS and airbag systems, wiring, fuses, and the hybrid powertrain control module. Dealer-level diagnosis is recommended if no other code or cause is found. For Nissan Altima hybrid vehicles, it is an issue in the hybrid powertrain and includes the hybrid battery, the transmisison, and the inverter.

This code indicates a problem with a hybrid battery air-temperature sensor circuit. Possible causes include a failed temperature sensor, wiring fault, powertrain control module, or an internal hybrid battery issue. The hybrid battery is the cause in approximately 90% of cases.

This code indicates a problem with the relays that control the high-voltage system. The issue is often located inside the hybrid battery, but it may also involve the hybrid controller, relay circuits, or other under-hood components. Further diagnosis may be required if replacing the hybrid battery does not resolve the code. It is a primary code.

Code P0AFA indicates that hybrid battery voltage is not detected on one or more blocks. Possible causes include a loose or improperly installed service disconnect, a voltage-sensor connection issue, a high-voltage fuse, damaged high-voltage wiring, or the battery control module. Symptoms include failure to enter READY mode, a hybrid warning, and vehicle failure to power up.

This code indicates that a hybrid battery voltage-sensing circuit has detected an open circuit or a battery-block voltage below 2.5 volts. The likely cause is the hybrid battery ECU, voltage sensor, related connections, or the hybrid battery itself. If the hybrid battery was recently replaced, confirm that the 12-volt battery is fully charged and tests properly; a weak 12-volt battery does not cause the fault but may prevent the code from clearing.

This code indicates that hybrid battery voltage-sensing circuit B has detected an open circuit or a battery-block voltage below 2.5 volts. The issue is usually in the connection between the battery block and the hybrid battery ECU or voltage sensor rather than in the individual battery module.

This code indicates that hybrid battery voltage-sensing circuit C has detected an open circuit or a battery-block voltage below 2.5 volts. The issue is usually in the connection between the battery block and the hybrid battery ECU or voltage sensor rather than in the individual battery module.

This code indicates that hybrid battery voltage-sensing circuit D has detected an open circuit or a battery-block voltage below 2.5 volts. The issue is usually in the connection between the battery block and the hybrid battery ECU or voltage sensor rather than in the individual battery module.

This code indicates that hybrid battery voltage-sensing circuit E has detected an open circuit or a battery-block voltage below 2.5 volts. The issue is usually in the connection between the battery block and the hybrid battery ECU or voltage sensor rather than in the individual battery module.

This code indicates that hybrid battery voltage-sensing circuit F has detected an open circuit or a battery-block voltage below 2.5 volts. The issue is usually in the connection between the battery block and the hybrid battery ECU or voltage sensor rather than in the individual battery module.

This code indicates that hybrid battery voltage-sensing circuit G has detected an open circuit or a battery-block voltage below 2.5 volts. The issue is usually in the connection between the battery block and the hybrid battery ECU or voltage sensor rather than in the individual battery module.

Code P0BBD indicates that one or more hybrid battery blocks differ in voltage by more than 1 volt, usually because a battery module is failing. The hybrid battery is the cause in approximately 90–95% of cases. The vehicle will remain drivable, often in reduced-power (limp) mode. P0BBD is a primary code, but engine no-start codes such as P0A0F or P0AB9 and inverter codes take priority because power flows from the engine through the inverter to the hybrid battery. An engine that repeatedly fails to start can place added strain on and potentially damage the hybrid battery. An inverter failure typically prevents the vehicle from starting or transferring power and only rarely damages the hybrid battery.

On applicable GM vehicles, code P0C0E indicates an open or short circuit in the drive-motor inverter voltage circuit. This is a primary inverter-system code and is not caused by the hybrid battery. The vehicle may not start or drive, and professional diagnosis is required.

Code P1116 indicates that the engine coolant temperature is outside the expected range. It may appear with code P1121 for the coolant flow-control valve, which directs coolant through the heater system. An unresolved cooling-system problem can cause the engine or inverter to overheat and may eventually damage the hybrid battery.

Code P1121 indicates a problem with the coolant flow-control valve, also known as the water-control valve. This valve regulates coolant flow through the Prius coolant storage system. The vehicle may be drivable for a short time, but fuel economy and performance can worsen as the condition progresses. If left unresolved, the vehicle may eventually fail to start and require towing.

On applicable Nissan hybrid vehicles, code P1196 indicates that the engine started when commanded but then stalled. This is a primary engine-performance code and is not caused by the hybrid battery. Engine, fuel-delivery, throttle-body, and related systems should be diagnosed before secondary codes.

On Honda hybrid vehicles, code P1440 indicates a fault involving the Motor Power Inverter module. It often appears with other codes and is not usually the primary fault. If P1440 is the only code present, Honda service information may recommend replacement of the MPI module. Professional diagnosis is recommended before repairs are performed.

Code P261B indicates that the engine control module is not detecting the expected operating speed from the electric engine coolant pump. The cause may be the pump, its sensor, wiring, or the control module. If the pump is running slowly or has stopped, the engine may overheat, stall, or suffer damage. This code is not caused by the hybrid battery.

Code P3000 is a general hybrid-system malfunction code that can be triggered by more than 200 conditions. If another hybrid-system code is present, diagnose that code first. On a Generation 2 Prius, subset code 123 may indicate the hybrid battery ECU. Subset codes 388 or 389 may indicate a fuel-delivery problem that can prevent the vehicle from starting. Dealer-level diagnosis is recommended when P3000 appears by itself or the subset code is unknown.

Code P3004 indicates a problem in the high-voltage power circuit. Possible causes include the hybrid battery, 12-volt battery, main wiring harness, or other components under the hood. The hybrid battery is the cause in approximately 60–80% of cases, but the 12-volt battery should be tested first. If its voltage is low(below 10 Volts), the relays inside the hybrid battery may not operate correctly and can trigger this code.

Code P3009 indicates an electrical isolation fault between the vehicle’s high-voltage system and the low-voltage system or vehicle body. Only on older Toyota Prius 2001-2003, it may prevent the car from starting or shifting into Drive or Reverse. Possible sources include the hybrid battery, inverter, air-conditioning compressor, transmission, or ABS servo motor. Toyota subset codes help identify the likely source: 526 is general code emaning hybrid system and not indicative of a component or system, 611 points to the inverter or A/C compressor, 612 confirms the hybrid battery, 613 points to the transmission or inverter, and 614 may involve the transmission, inverter, or hybrid battery. Because this fault can involve several high-voltage components, diagnosis by a Toyota dealer or a Hybrid specialist repair shop is recommended. A weak 12-volt battery does not directly cause P0AA6, but electrical interference may cause a stored code to become active after a recent battery replacement.

This code indicates that hybrid battery block 1 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 2 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 3 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 4 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 5 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 6 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 7 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 8 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 9 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 10 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 11 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 12 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 13 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 14 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 15 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 16 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

This code indicates that hybrid battery block 17 is more than 1 volt lower than the surrounding blocks. The difference may be caused by weak battery modules, cell imbalance, or increasing internal resistance. The code often appears with P0A80 and generally indicates that the hybrid battery pack requires replacement.

Code P3190 indicates that the engine started when commanded but then stalled or produced insufficient power. This is a primary engine-performance code and is not caused by the hybrid battery. Engine, fuel-delivery, throttle-body, mass-airflow, and related systems should be diagnosed first.

Code P3191 indicates that the hybrid control system commanded the engine to start, but the engine failed to run. This is a primary engine-performance code and is not caused by the hybrid battery. Engine, fuel-delivery, throttle-body, mass-airflow, and related systems should be diagnosed first.

Code P3193 means the hybrid system detected a condition consistent with running out of fuel. It is not a hybrid battery code, however it is a Primary code. If the vehicle repeatedly tries to start the engine with no fuel, it can drain the hybrid battery, so the vehicle should be refueled before further start attempts. If the code returns after refueling, the cause may be a fuel delivery problem (fuel pump, filter, or pressure) or a faulty fuel level sensor.

Code U0100 means another computer on the vehicle has stopped receiving messages from the engine control module (ECM/PCM). This will cause a no start condition and is a Primary code. Common causes include a failed (ECM/PCM), loss of power or ground to the engine computer, a blown fuse, damaged or corroded network (CAN) wiring or connectors, or water intrusion. A failed engine computer is the most likely cause. U codes should usually be addressed before other codes because communication faults can cause other codes to set. If the car is driveable and there is another hyrbid code such as P0A80 replace the hyrbid battery first, the U0100 is likely caused by lack of voltage from the 12-volt battery when the hybrid battery is weak on power due to a failed code.

Code U0101 means another computer on the vehicle is not receiving the expected messages from the transmission control module. It is not a hybrid battery code. Possible causes include a weak 12-volt battery, loss of power or ground to the transmission computer, a blown fuse, or a network (CAN) wiring or connector problem. Secondary Code – always diagnose and resolve Primary codes first, the code may clear once the Primary code is resolved

Code U0111 means another computer on the vehicle cannot receive messages from the hybrid battery control module (battery ECU or smart unit). This is a primary code and can cause a no start condition. Common causes include a hybrid battery ECU fault, loss of power or ground to the battery computer, a disconnected connector (often after battery service), damaged network (CAN) wiring, corrosion, or a blown fuse. Replacing the hybrid battery is the primary step, if it does not resolve the issue further diagnosis is needed.

Code U0123 means the vehicle has lost communication with the yaw rate sensor, which tells the stability and brake systems how the vehicle is moving. It is not a hybrid battery code. Diagnosis involves the brake, stability control, sensor, and network (CAN) wiring.

Code U0146 means the vehicle’s gateway module, which passes data between different computer networks, cannot communicate. When the gateway goes offline, many systems may appear to fail at once and a long list of unrelated U codes may appear. This usually points to one shared problem, such as gateway power or ground, a fuse, network wiring, water intrusion, or one module disrupting the network, rather than several failed computers. It is not a hybrid battery code.

Code U0293 means another computer on the vehicle cannot receive messages from the hybrid battery control module (battery ECU or smart unit). This is a primary code and can cause a no start condition. Common causes include a hybrid battery ECU fault, loss of power or ground to the battery computer, a disconnected connector (often after battery service), damaged network (CAN) wiring, corrosion, or a blown fuse. Replacing the hybrid battery is the primary step, if it does not resolve the issue further diagnosis is needed.