DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P00C8
P00C8 indicates that the powertrain control module has detected an open circuit or supply voltage fault on the control circuit for the fuel pressure regulator A solenoid. The computer commands a specific current to the solenoid, but the circuit does not carry the expected voltage, so the regulator cannot be controlled as intended.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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