PowertrainP2178
CautionSeverity: Caution - get it checked when you can
Mixture too rich
Key terms: Control module: a small computer that runs one part of the car · 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 36
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P2178 | No description available | Powertrain |
| BAIC Motor | P2178 | System Too Rich Bank 1 Brand | Powertrain |
| Mercedes-Benz | P2178 | No description available | Powertrain |
| BMW | P2178 | Mixture too rich Brand | Powertrain |
| BYD | P2178 | System too rich off idle Brand | Powertrain |
| Chery | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| Chrysler | P2178 | System too rich off idle Brand | Powertrain |
| Daewoo | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| DFFS | P2178 | Mixture adjustment failure Brand | Powertrain |
| DFFX | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| DFXK | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| EOBD | P2178 | System too rich off idle bank 1 Brand | Powertrain |
| Geely | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| GM | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| Great Wall | P2178 | System Too Rich Off Idle Brand | Powertrain |
| Hafei | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| Holden | P2178 | Fuel Trim System Rich at Cruise or Acceleration Brand | Powertrain |
| Hyundai | P2178 | No description available | Powertrain |
| Isuzu | P2178 | No description available | Powertrain |
| Land Rover | P2178 | No description available | Powertrain |
| Mahindra | P2178 | No description available | Powertrain |
| Maserati | P2178 | System too rich - off idle (bank 1) Brand | Powertrain |
| Mitsubishi | P2178 | Fuel trim too rich Brand | Powertrain |
| Opel | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| Peugeot | P2178 | No description available | Powertrain |
| Porsche | P2178 | No description available | Powertrain |
| Proton | P2178 | Fuel trim too rich Brand | Powertrain |
| Saab | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| MG (SAIC) | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| Smart | P2178 | No description available | Powertrain |
| Sprinter | P2178 | No description available | Powertrain |
| Suzuki | P2178 | System too Rich off Idle Bank 1 Brand | Powertrain |
| SWM Motor | P2178 | Fuel system is too rich in non-idling conditions Brand | Powertrain |
| Tata | P2178 | System Too Rich Off Idle Bank 1 Brand | Powertrain |
| Toyota | P2178 | Mixture adjustment failure Brand | Powertrain |
| Volkswagen | P2178 | system too rich off idle; Short to plus 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.
5Related codes
Browse Pxxx codes or P217xx codes.