OBD Code P0686

ECM/PCM Power Relay Control Circuit Low

What’s mean?

OBD2 Code P0686 Definition:
The Engine Control Module (ECM) has detected a low voltage condition to the ECM.

Symptoms

Possible sumptoms of P0686
– Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

Possible causes of P0686
– Weak battery- Low voltage while cranking – Poor engine control module electrical connection – Open or short engine control module circuit

Possible Solutions