OBD-II code · Powertrain (generic, extended)
P2C03 Fuel Pressure Regulator D Control Circuit Low
Voltage on the fuel pressure regulator D control line is below the expected window. Wire shorted to ground or coil short.
Is it safe to drive with P2C03?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to ground
- PossibleInternal short in 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
- P0091Fuel Pressure Regulator A Control Circuit Low
- P233BFuel Pressure Regulator C Control Circuit Low
- P2C00Fuel Pressure Regulator C Performance
- P2C01Fuel Pressure Regulator D Performance
- P2C02Fuel Pressure Regulator D Control Circuit/Open
- P2C04Fuel Pressure Regulator D Control Circuit High
- P2C05A Camshaft Profile Actuator Position Sensor A Circuit Bank 1
- P2C06A Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.