What does code P0688 mean?

ECM/PCM Power Relay Sense Circuit/Open: The ECM power relay sense circuit is open.

P0688 is rated as high severity. Address soon — may cause further damage.

P0688

ECM/PCM Power Relay Sense Circuit/Open

Powertrain Code · High

What does P0688 mean?

The ECM power relay sense circuit is open.

System: ECU

P0688 is a powertrain diagnostic trouble code indicating ecm/pcm power relay sense circuit/open. 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.