P2C02 code meaning
Fuel Pressure Regulator D Control Circuit/Open
Powertrain system Generic code P2Cxx codes Check engine light
What P2C02 means
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.
P2C02 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2C02
- Check engine light on
- Power reduction because one pump is no longer controlled
- Possible rail pressure fault codes alongside
Common causes of P2C02
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel pressure regulator dHigh pressure fuel pumpWiring harness
What each part of P2C02 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| C | Area: hybrid propulsion. |
| 02 | The exact fault in that area. |
What to do next
- Note P2C02 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2C02
What does P2C02 mean?
P2C02 means "Fuel Pressure Regulator D Control Circuit/Open". P2C02 is the open-circuit check on the control line of fuel pressure regulator D. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C02?
Drive gently and only to a workshop. With P2C02 the car can go into limp mode (reduced power) to protect itself.
Will P2C02 fail an emissions test?
Yes, it can. P2C02 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2C02 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2C02 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.