P2C02Fuel Pressure Regulator D Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2C02 is the open-circuit check on the control line of fuel pressure regulator D. In GM's tables 23OBDG07 and 24OBDG07 this is the second fuel quantity control valve of the high-pressure system, the twin of the valve watched by P0090. While the driver is switched off, the ECM expects a defined voltage on the line; if it reads low, it treats the load as disconnected, which corresponds to more than 200 kilohms between the ECU pin and the valve. Battery voltage must exceed 10.9 V and the engine must turn faster than 80 rpm, and the fault has to persist for 20 seconds. GM rates it as a one-trip fault. A broken wire, a corroded plug at the pump or an open valve coil are the usual causes; the affected pump can no longer be regulated.
- What you may notice
- Check engine light on
- Power reduction because one pump is no longer controlled
- Possible rail pressure fault codes alongside
- Likely causes
- LikelyBroken wire or loose terminal in the valve circuit
- PossibleCorroded or unplugged connector at the high-pressure pump
- PossibleOpen coil in the quantity control valve
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.