P2C01
Fuel Pressure Regulator D Performance
Fuel pressure regulator D does not maintain rail pressure within the calibrated tolerance. Aged regulator or contamination affecting flow.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Common causes
Ordered by how often each turns out to be the cause.
- Regulator agedCommon
- Contamination affecting regulator seatPossible
Parts involved
- Fuel Pressure Regulator D
- Wiring Harness
- Fuel Rail
P2C01 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.