What does code P0686 mean?

ECM/PCM Power Relay Control Circuit Low: The ECM power relay control circuit has low voltage.

P0686 is rated as high severity. Address soon — may cause further damage.

P0686

ECM/PCM Power Relay Control Circuit Low

Powertrain Code · High

What does P0686 mean?

The ECM power relay control circuit has low voltage.

System: ECU

P0686 is a powertrain diagnostic trouble code indicating ecm/pcm power relay control circuit low. This code is classified as high severity, which means: address soon — may cause further damage.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.