#PIP4616 - Intermittent SES Light Due To P1400 - Possible EGR Concern - (Apr 1, 2009)
- Intermittent SES Light due to DTC P1400 - Possible EGR Concern
- 2006-2009 Cadillac DTS
- 2007-2009 Buick Lucerne
- with 4.6L Northstar Engine (RPO L37 or LD8)
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
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