PowertrainP1391
CautionSeverity: Caution - get it checked when you can
Intermittent Loss of CMP or CKP
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 27
| Brand | Code | Description | System |
|---|---|---|---|
| BAIC Motor | P1391 | Acceleration sensor fault Brand | Powertrain |
| BYD | P1391 | G-sensor rationality diagnostics Brand | Powertrain |
| Chery | P1391 | G sensor rationality diagnosis Brand | Powertrain |
| Daewoo | P1391 | Interm Loss of CMP or CKP Brand | Powertrain |
| DFXK | P1391 | Weak acceleration sensor implausible Brand | Powertrain |
| EOBD | P1391 | Ajaandur (plokk 2): madal Brand | Powertrain |
| Ford | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| Geely | P1391 | G Sensor Circuit Fault Brand | Powertrain |
| GM | P1391 | Interm Loss of CMP or CKP Brand | Powertrain |
| Great Wall | P1391 | G Sensor Plausibility Fault Brand | Powertrain |
| Holden | P1391 | Rough Road Sensor Performance Brand | Powertrain |
| Isuzu | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| Land Rover | P1391 | Glow plug - circuit low Brand | Powertrain |
| Mahindra | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| Maserati | P1391 | Fuel pump 3 control circuit high Brand | Powertrain |
| Mazda | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| Mitsubishi | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| Nissan | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| Opel | P1391 | Interm Loss of CMP or CKP Brand | Powertrain |
| Peugeot | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| Porsche | P1391 | Klopfregelung Zylinder 5: Anschlag erreicht Brand | Powertrain |
| Proton | P1391 | Camshaft Pos.Sensor-G40,Bank2 Short To Ground Brand | Powertrain |
| Saab | P1391 | Interm Loss of CMP or CKP Brand | Powertrain |
| Suzuki | P1391 | Intermittent Loss of CMP or CKP SAE | Powertrain |
| SWM Motor | P1391 | Weak acceleration sensor rationality fault Brand | Powertrain |
| Toyota | P1391 | Camshaft position sensor, bank 2 short to ground Brand | Powertrain |
| Volkswagen | P1391 | Camshaft Position Sensor Bank 2 (G163): Short to Ground 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 P139xx codes.