Diagnostic Aids

When attempting to diagnose an intermittent problem, use scan tool to review malfunction history information. This data can be used to duplicate a problem.

Battery voltage is supplied to EGR valve terminal "E" when ignition is on. Check EGR fuse in underhood fuse/relay block before diagnosing this DTC. Carbon build-up around EGR pintle may restrict pintle movement. An open in PCM diode feedback circuit will result in unstable valve operation resulting in engine surge. Moisture associated with exhaust system may also cause EGR valve to freeze and stick in extreme cold weather conditions.