P013B

Intermittent SES Light due to DTCs P013B and or P0411 DTC - Reprogram ECM - keywords calibration cold controls engine engineering investigation lamp light program recalibrate reflash ses start - (Jun 12, 2008)

Subject: Intermittent SES Light due to DTCs P013B and/or P0411 DTC

Models: 2008 Chevrolet Colorado
2008 GMC Canyon
2008 Hummer H3
with 2.9L Engine (RPO LLV)
or 3.7L Engine (RPO LLR)
2008 Chevrolet Trailblazer
2008 GMC Envoy
2008 Saab 97x
with 4.2L Engine (RPO LL8)

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

On rare occasions, an intermittent SES light may be experienced due to DTCs P013B and/or P0411.

Recommendation/Instructions:

If the SI diagnostics do not isolate a cause for this concern, reprogram the ECM with the latest TIS2Web calibrations and evaluate the concern. At this time, the latest calibration is titled "New calibration with diagnostic enhancements for DTC P0411." This calibration, or any that follow, is designed to address this concern.

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.