P00CAFuel Pressure Regulator A Solenoid Supply Voltage Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Some engine control modules switch the solenoid of fuel pressure regulator A on both sides: the ground side is monitored by P0090 to P0092, the supply side (high-side driver) by P00C8 to P00CA. On gasoline direct injection the regulator is typically the control valve on the high-pressure pump; on some diesels it is the regulator designated as regulator 1. P00CA reports a short to battery voltage on the supply side, so the driver can no longer switch the supply off. Rail pressure can then not be controlled, causing starting problems, stalling or reduced power; documented systems turn on the warning light in the first drive cycle.
- What you may notice
- Check engine light on
- Hard starting or stalling
- Loss of power or limp mode
- Likely causes
- LikelySupply wire shorted to battery voltage
- PossibleWater or corrosion in the connector
- PossibleInternal fault in the solenoid
- RareHigh-side driver in the engine control module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.