OBD-II code · Powertrain (generic, extended)
P2C04 Fuel Pressure Regulator D Control Circuit High
Voltage on the fuel pressure regulator D control line is above the expected window. Wire shorted to B+ or coil open.
Is it safe to drive with P2C04?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen regulator coil
- Less likelyConnector pins corroded - high contact resistance
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Pressure Regulator D, Wiring Harness, Fuel Rail
Related codes
- P0092Fuel Pressure Regulator A Control Circuit High
- P233CFuel Pressure Regulator C Control Circuit High
- P2C01Fuel Pressure Regulator D Performance
- P2C02Fuel Pressure Regulator D Control Circuit/Open
- P2C03Fuel Pressure Regulator D Control Circuit Low
- P2C05A Camshaft Profile Actuator Position Sensor A Circuit Bank 1
- P2C06A Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1
- P2C07A Camshaft Profile Actuator Position Sensor A Circuit Low Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.