DTC codes / P06xx · Computer and output circuits / P06C0
P06C0 indicates that the engine control module (ECM) has detected an out-of-range or performance fault in the glow plug circuit for cylinder 8, typically on diesel engines. The ECM monitors the circuit's electrical characteristics and compares them to expected values; when the voltage or current falls outside the normal range for a calibrated period, it stores this code.
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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