GM OBD Trouble Code 68

By Jim Taddei, May 1, 2009

A/C Clutch Relay circuit error (shorted to ground)

The ECM monitors the A/C compressor relay control circuit. If the control circuit is shorted to ground the ECM will set code 68 and the A/C compressor operation will be disabled.

Fault Code Description

  • 68 - A/C Clutch Relay circuit error (shorted to ground)


  • Poor A/C performance

Common Problems

  • Shorted wiring to A/C compressor relay
  • Faulty A/C compressor relay

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