FixVault

DTC P0687 - ECM/PCM Power Relay Control Circuit High

DTC DESCRIPTION P0687 - ECM/PCM POWER RELAY CONTROL CIRCUIT HIGH

Description:  This DTC sets when the PCM power relay is commanded ON and the PCMRC circuit voltage exceeds a calibrated value.
Possible Causes: 
  • PCMRC circuit short to voltage
  • Damaged PCM
Diagnostic Aids: 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST B .