Mercedes-Benz fault codes
20,291 codes · 1,724 vehicle records · 258 ECU records · 56,350 live-data parameters
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Codes 20,291
| Code | Description | Brands | System |
|---|---|---|---|
| P0AA100 | The contact 'Positive terminal' of contactor A in the high-voltage battery is jammed closed. | 2 | Powertrain |
| P0AA19F | The contact 'Positive terminal' of contactor A in the high-voltage battery is jammed closed. The switch is jammed closed. | 1 | Powertrain |
| P0AA2 | Battery management system (BMS) voltage signal is invalid | 26 | Powertrain |
| P0AA294 | The contact 'Positive terminal' of contactor A in the high-voltage battery is jammed open. There is an unexpected instruction. | 1 | Powertrain |
| P0AA29E | The contact 'Positive terminal' of contactor A in the high-voltage battery is jammed open. The switch is jammed open. | 1 | Powertrain |
| P0AA3 | Hybrid Battery Negative Contactor Circuit | 24 | Powertrain |
| P0AA311 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Circuit Short To Ground. | 1 | Powertrain |
| P0AA312 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Circuit Short To Battery. | 1 | Powertrain |
| P0AA313 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. There is an open circuit. | 1 | Powertrain |
| P0AA314 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. There is a short circuit to ground or an open circuit. | 1 | Powertrain |
| P0AA316 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. The limit value for electrical voltage has not been attained. | 1 | Powertrain |
| P0AA317 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. The limit value for electrical voltage has been exceeded. | 1 | Powertrain |
| P0AA31C | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Circuit Voltage Out of Range. | 1 | Powertrain |
| P0AA372 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Actuator Stuck Open. | 1 | Powertrain |
| P0AA373 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Actuator Stuck Closed. | 1 | Powertrain |
| P0AA374 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Actuator Slipping. | 1 | Powertrain |
| P0AA385 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. There is a signal above the permissible limit value. | 1 | Powertrain |
| P0AA386 | The contact 'Negative terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Signal Invalid. | 1 | Powertrain |
| P0AA4 | Hybrid/EV Battery Negative Contactor Circuit Stuck Closed | 31 | Powertrain |
| P0AA49F | The contact 'Negative terminal' of contactor A in the high-voltage battery is jammed closed. The switch is jammed closed. | 1 | Powertrain |
| P0AA5 | Hybrid Battery Negative Contactor Circuit Stuck Open | 25 | Powertrain |
| P0AA6 | Hybrid/Electric Vehicle Battery Voltage Shrinkage | 32 | Powertrain |
| P0AA61A | There is an insulation fault in the hybrid/high-voltage on-board electrical system. Circuit Resistance Below Threshold. | 1 | Powertrain |
| P0AA61E | Hybrid Battery Voltage System Isolation Fault. circuit resistance out of range | 1 | Powertrain |
| P0AA649 | There is an insulation fault in the hybrid/high-voltage on-board electrical system. There is an internal electrical fault. | 1 | Powertrain |
| P0AA7 | Cell voltage sensor fault | 32 | Powertrain |
| P0AA700 | Hybrid Battery Voltage Isolation Sensor Circuit | 1 | Powertrain |
| P0AA703 | IMD isolation measure path stuck | 1 | Powertrain |
| P0AA704 | Hybrid/EV Battery Voltage Isolation Sensor Circuit | 1 | Powertrain |
| P0AA706 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Algorithm Based Failure. | 1 | Powertrain |
| P0AA707 | IMD isolation measure path stuck | 1 | Powertrain |
| P0AA708 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Bus Signal / Message Failure. | 1 | Powertrain |
| P0AA709 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Component Failure. | 1 | Powertrain |
| P0AA716 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Circuit Voltage Below Threshold. | 1 | Powertrain |
| P0AA717 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Circuit Voltage Above Threshold. | 1 | Powertrain |
| P0AA71C | Hybrid Battery Voltage Isolation Sensor Circuit. circuit voltage out of range | 1 | Powertrain |
| P0AA71E | The ohmmeter for isolation resistance in the high-voltage battery module has an electrical fault. | 1 | Powertrain |
| P0AA742 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. General Memory Failure. | 1 | Powertrain |
| P0AA747 | Hybrid/EV Battery Voltage Isolation Sensor Circuit | 1 | Powertrain |
| P0AA748 | Hybrid/EV Battery Voltage Isolation Sensor Circuit | 1 | Powertrain |
| P0AA749 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Internal Electronic Failure. | 1 | Powertrain |
| P0AA761 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Signal Calculation Failure. | 1 | Powertrain |
| P0AA764 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Signal Plausibility Failure. | 1 | Powertrain |
| P0AA784 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Signal Below Allowable Range. | 1 | Powertrain |
| P0AA785 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. Signal Above Allowable Range. | 1 | Powertrain |
| P0AA7A3 | The ohmmeter for the isolation resistance in the hybrid/high-voltage battery module has an electrical fault. System Voltage High. | 1 | Powertrain |
| P0AA7FA | Hybrid/EV Battery Voltage Isolation Sensor Circuit. FA | 1 | Powertrain |
| P0AA7FB | Hybrid/EV Battery Voltage Isolation Sensor Circuit. FB | 1 | Powertrain |
| P0AA800 | Hybrid/EV Battery Voltage Isolation Sensor Circuit Range/Performance | 1 | Powertrain |
| P0AA8FA | No description available | 1 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.