P0689
ECM/PCM Power Relay Sense Circuit Low
Powertrain Code · High
What does P0689 mean?
The ECM power relay sense circuit has low voltage.
System: ECU
P0689 is a powertrain diagnostic trouble code indicating ecm/pcm power relay sense 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.
