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For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Rainier 🢒 Bulletins 🢒 SES Light Due to a P0606 DTC - Install Updated PCM Calibrations - keywords 4.2 4.2L CEL controls engine lamp LL8 MIL P0606 PCM power reduced

SES Light Due to a P0606 DTC - Install Updated PCM Calibrations - keywords 4.2 4.2L CEL controls engine lamp LL8 MIL P0606 PCM power reduced

Subject:SES Light Due to a P0606 DTC - Install Updated PCM Calibrations

Models:2004-2005 Buick Rainier
2004-2005 Chevrolet Trail Blazer
2004-2005 GMC Envoy
2004 Oldsmobile Bravada
2005 Saab 9-7x
with 4.2L Engine (VIN S - RPO LL8)


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 a Reduced Engine Power Message may be experienced due a DTC P0606 DTC. This may be due to the software and calibration not being optimum for all driving conditions.

Recommendation/Instructions:

If a Reduced Engine Power Message is not present right now and the P0606 is just a history DTC, reprogram the PCM with the latest calibrations that are available in TIS2000. If the P0606 is resetting, perform the P0606 diagnosis from SI and repair as necessary.

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.