For 1990-2009 cars only
Cold Start P1400 - keywords 08 6.2 DTC emission engine idle ignition L92 MIL RPM SES startup
| Subject: | Cold Start P1400 |
| Models: | 2008 Cadillac Escalade |
| 2008 GMC Yukon |
| 2008 Hummer H2 |
| Equipped with the 6.2L L92 engine. |
This PI was superseded to update Recommendation/Instructions. Please discard PIP4286.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
A dealer may encounter a customer concern of SES light and DTC P1400 after a cold start.
Recommendation/Instructions:
A dealer may encounter a customer concern of SES light and DTC P1400 after a cold start.
There has been a new calibration released to address DTC P1400. Reprogram the ECM and evaluate repairs.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
