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 |
|---|---|---|---|
| B1233 | Right cooling fin overheating | 21 | Body |
| B123349 | Temperature sensor 4 of the front electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123364 | Temperature sensor 4 of the front electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1234 | Rear Side-Air Bag Circuit Shorted to Power Supply (Driver Side) | 19 | Body |
| B123449 | Temperature sensor 5 of the front electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123464 | Temperature sensor 5 of the front electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1235 | Rear Side-Air Bag Circuit High Resistance (Passenger Side) | 17 | Body |
| B123511 | PARKTRONIC sensor 9 has a malfunction. There is a short circuit to ground. | 1 | Body |
| B123597 | PARKTRONIC sensor 9 has a malfunction. The system function is restricted. | 1 | Body |
| B1236 | Rear Side-Air Bag Circuit Low Resistance (Passenger Side) | 18 | Body |
| B123649 | The power supply of sensor 1 of the front electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123664 | The power supply of sensor 1 of the front electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1237 | Buzzer fault | 17 | Body |
| B123749 | The power supply of sensor 2 of the front electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123764 | The power supply of sensor 2 of the front electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1238 | Rear Side-Air Bag Circuit Shorted to Power Supply (Passenger Side) | 17 | Body |
| B123849 | Current sensor 1 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123864 | Current sensor 1 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1239 | Water Sensor In The Fuel. Short Circuit To Ground | 16 | Body |
| B123949 | Current sensor 2 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123964 | Current sensor 2 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B123A11 | PARKTRONIC sensor 10 has a malfunction. There is a short circuit to ground. | 1 | Body |
| B123A67 | No description available | 2 | Body |
| B123A92 | No description available | 2 | Body |
| B123A97 | PARKTRONIC sensor 10 has a malfunction. The system function is restricted. | 1 | Body |
| B123B49 | Voltage sensor 1 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123B64 | Voltage sensor 1 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B123C49 | Voltage sensor 2 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123C64 | Voltage sensor 2 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B123D49 | Temperature sensor 1 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123D64 | Temperature sensor 1 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B123E49 | Temperature sensor 2 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123E64 | Temperature sensor 2 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B123F49 | Temperature sensor 3 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B123F64 | Temperature sensor 3 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1240 | Air conditioner Control Module sets DTC if Console temperature Actuator and Switch has been detected over 4.9V for 0.3 seconds | 22 | Body |
| B124049 | Temperature sensor 4 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B124064 | Temperature sensor 4 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1241 | Adaptive speed limiter button | 21 | Body |
| B124149 | Temperature sensor 5 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B124164 | Temperature sensor 5 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1242 | Left rearview mirror warning light failure | 22 | Body |
| B1243 | Right rearview mirror warning light failure | 20 | Body |
| B1244 | Left rear parking assist sensor failure | 21 | Body |
| B124411 | PARKTRONIC sensor 1 has a malfunction. There is a short circuit to ground. | 1 | Body |
| B124497 | PARKTRONIC sensor 1 has a malfunction. The system function is restricted. | 1 | Body |
| B1245 | Right rear parking assist sensor failure | 18 | Body |
| B124549 | The power supply of sensor 1 of the rear electric booster heater has a malfunction. There is an internal electrical fault. | 1 | Body |
| B124564 | The power supply of sensor 1 of the rear electric booster heater has a malfunction. There is an implausible signal. | 1 | Body |
| B1246 | Kickdown Switch Circuit Malfunction | 17 | Body |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.