What Does P0685 Mean? ECM/PCM Power Relay Control Circuit/Open Symptoms
What Does P0685 Mean? ECM/PCM Power Relay Control Circuit/Open Symptoms. What Does P0685 Mean? ECM/PCM Power Relay Control Circuit/Open Symptoms. This diagnostic trouble code means the engine computer detected a problem in the power relay control circuit. The relay supplies electrical power to the engine control module, also called the ECM or PCM. If that…
