PowertrainP01A4
CautionSeverity: Caution - get it checked when you can
Alternative fuel rail pressure sensor performance
Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Powertrain: engine, transmission and emissions
1What it means in plain English
This code is in the fuel, air and oxygen sensor range, which also includes coolant temperature faults.
2Common causes
- Dirty or faulty mass air flow sensor
- Vacuum or intake air leak
- Weak fuel pump or clogged fuel filter
- Faulty fuel injector
- Faulty oxygen sensor
- Wiring or connector fault
3Can I drive?
Have it diagnosed if the engine runs badly or the code keeps returning. Because this range includes coolant temperature sensors, watch the temperature gauge: if it climbs into the red, or the engine overheats or stalls, stop safely and get professional help.
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 13
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P01A4 | No description available | Powertrain |
| Daewoo | P01A4 | No description available | Powertrain |
| EOBD | P01A4 | Alternatieve brandstofraildruksensor prestatie Brand | Powertrain |
| GM | P01A4 | No description available | Powertrain |
| Holden | P01A4 | Alternative Fuel Rail Pressure Sensor Performance Brand | Powertrain |
| Honda | P01A4 | No description available | Powertrain |
| Isuzu | P01A4 | No description available | Powertrain |
| Land Rover | P01A4 | Alternative Fuel Rail Pressure Sensor Performance Brand | Powertrain |
| Opel | P01A4 | No description available | Powertrain |
| Peugeot | P01A4 | No description available | Powertrain |
| Proton | P01A4 | No description available | Powertrain |
| Saab | P01A4 | No description available | Powertrain |
| Toyota | P01A4 | Alternative fuel rail pressure sensor performance 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 P01Axx codes.