SES Light Due to a P2431 DTC - Update ECM Calibration - keywords 2.2 2.2L AIR BARO CEL controls engine internal L61 PCM pending pump secondary SES
| Subject: | SES Light due to a P2431 DTC - Update ECM Calibration |
| Models: | 2006 Chevrolet Cobalt 2006 |
| Pontiac Pursuit (Canada Only) |
| Manufactured before September 12, 2005 |
| with 2.2L Engine (VIN F - RPO L61) |
| 2006 Saturn Ion |
| Manufactured before September 1, 2005 |
| with 2.2L Engine (VIN F - RPO L61) |
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 may be experienced due to a P2431 DTC. This may be due to an incorrect BARO reading that can occur if the ignition is turned on immediately following engine shut down. If this occurs, the PCM can store an inaccurate BARO reading, causing a P2431 DTC once the engine is restarted.
Recommendation/Instructions:
If the DTC occurs at the above conditions and the SI diagnostics do not isolate a cause for the DTC, reprogram the ECM with the latest TIS2000 calibrations
The following calibration numbers are designed to address this concern on the Chevrolet Cobalt and Pontiac Pursuit:
12604759 12604760 12604761 12604762 12604763 12604764 12604765 12604766 |
The following calibration numbers are designed to address this concern on the Saturn Ion:
12604798 12604799 12604800 12604801 12604802 12604803 12604804 12604805 |
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.
