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 |
|---|---|---|---|
| P0A94 | DC/DC converter performance | 29 | Powertrain |
| P0A9400 | DC/DC Converter Performance | 3 | Powertrain |
| P0A941F | The control unit 'DC/DC converter' has a malfunction. There is a sporadic fault. | 1 | Powertrain |
| P0A9442 | DC/DC Converter 'A' Performance - General Memory Failure (Safety test related error) | 1 | Powertrain |
| P0A9443 | DC/DC Converter 'A' Performance - Special Memory Failure | 1 | Powertrain |
| P0A9447 | The control unit 'DC/DC converter' has a malfunction. There is a runtime error. | 1 | Powertrain |
| P0A9448 | DC/DC Converter 'A' Performance - Supervision Software Failure | 1 | Powertrain |
| P0A9449 | LV chip protection trip fault | 1 | Powertrain |
| P0A9450 | Gate drive fault | 1 | Powertrain |
| P0A9453 | The control unit 'DC/DC converter' has a malfunction. The component is deactivated. | 1 | Powertrain |
| P0A9464 | The control unit 'DC/DC converter' has a malfunction. There is an implausible signal. | 1 | Powertrain |
| P0A9492 | The control unit 'DC/DC converter' has a malfunction. The function or the instruction is faulty. | 1 | Powertrain |
| P0A9496 | The control unit 'DC/DC converter' has a malfunction. There is an internal component fault. | 1 | Powertrain |
| P0A94FA | The control unit 'DC/DC converter' has a malfunction. DCDC Buck mode control. | 1 | Powertrain |
| P0A94FF | The control unit 'DC/DC converter' has a malfunction. Precharge error. | 1 | Powertrain |
| P0A95 | High Voltage Fuse A | 27 | Powertrain |
| P0A9500 | The electrical fuse for the high voltage has a malfunction. | 1 | Powertrain |
| P0A9515 | The electrical fuse for the high voltage has a malfunction. Circuit Short To Battery or Open. | 1 | Powertrain |
| P0A9B | Temperature sensor fault (severe) | 24 | Powertrain |
| P0A9B00 | The temperature sensor A of the high-voltage battery has an electrical fault. | 1 | Powertrain |
| P0A9B01 | Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. General Electrical Failure. | 1 | Powertrain |
| P0A9B02 | Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. General Signal Failure. | 1 | Powertrain |
| P0A9B09 | Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. Component Failure. | 1 | Powertrain |
| P0A9B13 | Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. There is an open circuit. | 1 | Powertrain |
| P0A9B64 | Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. There is an implausible signal. | 1 | Powertrain |
| P0A9C | Hybrid/EV Battery Temperature Sensor A Circuit Range/Performance | 29 | Powertrain |
| P0A9C09 | Temperature sensor A of the hybrid/high-voltage battery has a malfunction. Component Failure. | 1 | Powertrain |
| P0A9C84 | Temperature sensor A of the hybrid/high-voltage battery has a malfunction. There is a signal below the permissible limit value. | 1 | Powertrain |
| P0A9D | Hybrid/EV Battery Temperature Sensor A Circuit Low | 29 | Powertrain |
| P0A9D11 | Temperature sensor A of the hybrid/high-voltage battery has a short circuit to ground. There is a short circuit to ground. | 1 | Powertrain |
| P0A9E | Hybrid/EV Battery Temperature Sensor A Circuit High | 31 | Powertrain |
| P0A9F | Hybrid Battery Temperature Sensor A Circuit Intermittent/Erratic | 23 | Powertrain |
| P0AA0 | Hybrid Battery Positive Contactor Circuit | 26 | Powertrain |
| P0AA000 | Hybrid/EV Battery Positive Contactor Circuit | 1 | Powertrain |
| P0AA001 | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. There is a general electrical fault. | 1 | Powertrain |
| P0AA00A | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. General Electrical Failures - 2. | 1 | Powertrain |
| P0AA011 | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Circuit Short To Ground. | 1 | Powertrain |
| P0AA012 | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Circuit Short To Battery. | 1 | Powertrain |
| P0AA014 | The contact 'Positive 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 |
| P0AA016 | The contact 'Positive 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 |
| P0AA017 | The contact 'Positive 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 |
| P0AA01C | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Circuit Voltage Out of Range. | 1 | Powertrain |
| P0AA072 | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Actuator Stuck Open. | 1 | Powertrain |
| P0AA073 | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Actuator Stuck Closed. | 1 | Powertrain |
| P0AA074 | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Actuator Slipping. | 1 | Powertrain |
| P0AA085 | The contact 'Positive 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 |
| P0AA086 | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. Signal Invalid. | 1 | Powertrain |
| P0AA09E | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. The switch is jammed open. | 1 | Powertrain |
| P0AA09F | The contact 'Positive terminal' of the contactor in the hybrid/high-voltage battery has an electrical fault. The switch is jammed closed. | 1 | Powertrain |
| P0AA1 | Hybrid Battery Positive Contactor Circuit Stuck Closed | 31 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.