| Subject: | SES Light and Possible Reduced Engine Power Mode with DTC P1516 and/or P2101 |
| Models: | 2007 Chevrolet Cobalt |
| Manufactured Before 11/1/2006 |
| with 2.2L Engine (VIN D or F - RPO L61) |
This PI was superceded to advise that this only applies to vehicles built before 11/1/2006. Please discard PIP3879A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
On rare occasions, a SES light and reduced engine power mode may be experienced with DTC P1516 and/or P2101. When this concern is present, the throttle plate will flutter and move erratically causing the throttle body to emit a clicking noise.
Recommendation/Instructions:
If the SI diagnostics do not isolate a cause for this concern, replace the ECM for evaluation.
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.
