PowertrainP0A1B
CautionSeverity: Caution - get it checked when you can
Drive Motor A Control Module Performance
Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.
2Common causes
- Sensor or actuator fault
- Wiring or connector fault
- Vacuum or intake leak
- Fuel or ignition problem
- Control module fault
3Can I drive?
Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 31
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0A1B | Hybrid Battery. Temperature Sensor. (Sensor O.) - Low Signal Brand | Powertrain |
| BAIC Motor | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Mercedes-Benz | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| BYD | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Chery | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Daewoo | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Daihatsu | P0A1B | PCU error received Brand | Powertrain |
| DFFS | P0A1B | Microcontroller failure Brand | Powertrain |
| DFFX | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| DFXK | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| EOBD | P0A1B | Drevmotor 'A' kontrolmodul ydeevne Brand | Powertrain |
| Geely | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| GM | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Great Wall | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Hafei | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Holden | P0A1B | Output Current Control Not Plausible Brand | Powertrain |
| Honda | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| Hyundai | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| Isuzu | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| Land Rover | P0A1B | Drive motor A - control module Brand | Powertrain |
| Mitsubishi | P0A1B | MCU internal fail Brand | Powertrain |
| Opel | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Perodua | P0A1B | PCU error received Brand | Powertrain |
| Peugeot | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| Proton | P0A1B | MCU internal fail Brand | Powertrain |
| Saab | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| MG (SAIC) | P0A1B | Drive Motor A Control Module Brand | Powertrain |
| Subaru | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| Suzuki | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| Tata | P0A1B | Drive Motor A Control Module Performance SAE | Powertrain |
| Toyota | P0A1B | Lost communication with motor control unit (MCU) Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 12
These 7-character codes are manufacturer-specific variants of P0A1B and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P0A1B01 | Plausibility check of T30T (versus T30C) Brand | Powertrain |
| Mercedes-Benz | P0A1B11 | Control unit 'Electric machine A' has a malfunction. Circuit Short To Ground Brand | Powertrain |
| Mercedes-Benz | P0A1B12 | Control unit 'Electric machine A' has a malfunction. Circuit Short To Battery Brand | Powertrain |
| Mercedes-Benz | P0A1B16 | Undervoltage of V_REDPWR Brand | Powertrain |
| Mercedes-Benz | P0A1B17 | Overvoltage on V_REDPWR Brand | Powertrain |
| Mercedes-Benz | P0A1B42 | Das Steuergerät 'Elektrische Maschine A' hat Funktionsstörung. Es liegt ein allgemeiner Speicherfehler vor. Brand | Powertrain |
| Mercedes-Benz | P0A1B45 | Das Steuergerät 'Elektrische Maschine A' hat Funktionsstörung. Es liegt ein Fehler im Programmspeicher vor. Brand | Powertrain |
| Mercedes-Benz | P0A1B47 | Das Steuergerät 'Elektrische Maschine A' hat Funktionsstörung. Es liegt ein Laufzeitfehler vor. Brand | Powertrain |
| Mercedes-Benz | P0A1B48 | Das Steuergerät 'Elektrische Maschine A' hat Funktionsstörung. Es liegt ein Fehler im Steuerungsspeicher vor. Brand | Powertrain |
| Mercedes-Benz | P0A1B4B | Das Steuergerät 'Elektrische Maschine A' hat Funktionsstörung. Es liegt ein Fehler aufgrund Übertemperatur vor. Brand | Powertrain |
| Mercedes-Benz | P0A1B51 | Das Steuergerät 'Elektrische Maschine A' hat Funktionsstörung. Das Bauteil ist nicht programmiert. Brand | Powertrain |
| Mercedes-Benz | P0A1B9A | Das Steuergerät 'Elektrische Maschine A' hat Funktionsstörung. Die Betriebsbedingungen für die Komponente oder das System sind nicht erfüllt. Brand | Powertrain |
6Related codes
Browse Pxxx codes or P0A1xx codes.