OBD
P2C02
Fuel Pressure Regulator D Control Circuit/Open
What it means
P2C02 stands for Fuel Pressure Regulator D Control Circuit/Open. P2C02 is a P code, so the fault sits in the engine, transmission and emissions systems. For P2C02, work through the cause list below, cheapest checks first.
What to check first
For P2C02, pull the connector and inspect the terminals for spread, corrosion or backed-out pins before testing anything else.
Check these first
- P2C02: Faulty or contaminated sensor in the fuel/air metering circuit
- P2C02: Damaged or shorted wiring or connector for the affected circuit
- P2C02: Vacuum leak or intake system restriction
- P2C02: Failing fuel pump, injector, or fuel pressure regulator
What to do next
P2C02 belongs to the powertrain control system. These are the general steps for P2C02, and the exact cause on your vehicle can differ.
- P2C02: Read freeze frame data and related codes with an OBD-II scanner
- P2C02: Inspect the affected sensor wiring and connector for damage
- P2C02: Compare live sensor readings (fuel trim, airflow, temperatures) to manufacturer specs
- P2C02: Smoke test the intake system if lean or vacuum conditions are suspected
- P2C02: Replace the failed component after confirming it with live data
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Updated
Generic SAE J2012 definition. Last updated 2026-08-30.