OBD Code P0687

ECM/PCM Power Relay Control Circuit High

What’s mean?

OBD2 Code P0687 Definition:
The Engine Control Module (ECM) has detected a high voltage condition to the ECM.

Symptoms

Possible sumptoms of P0687
– Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

Possible causes of P0687
– Weak battery- Low voltage while cranking – Poor engine control module electrical connection – Open or short engine control module circuit

Possible Solutions