Intermittent Check Engine Light On, DTC P0128 Set (Diagnose and Reprogram PCM, if Necessary)
| Subject: | Intermittent Check Engine Light On, DTC P0128 Set (Diagnose and Reprogram PCM, if Necessary) |
| Models: | 2006 Buick Terraza |
| 2006 Chevrolet Impala, Malibu, Malibu Maxx, Monte Carlo, Uplander |
| 2006 Pontiac G6, Montana SV6 |
| 2006 Saturn Relay |
| with 3.5L or 3.9L Engine (VINs N, K, 1 -- RPOs LZ4, LZE, LZ9) |
Condition
Some customers may comment on a check engine light being illuminated. This condition is intermittent and upon investigation, the technician may find DTC P0128 set.
Correction
Verify that the cooling system is filled to the proper level and using a scan tool, verify that the thermostat is opening at the proper temperature. If everything is functioning properly, then reprogram the PCM with a new calibration using the Service Programming System (SPS).
An updated PCM calibration has been released to address this condition. This new service calibration is available on TIS2WEB.
Important: The new calibration is included in a calibration that addresses long crank time in hot restart situations.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J6354 | Powertrain Control Module Reprogramming with SPS | 0.4 hr |
Add | Diagnosis Time | 0.0-0.3 hr |
