Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006MONTE CARLO V6-3.5L VIN NREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTENGINE CONTROLS - INT. MIL ON/DTC P0128 SET
2006 Chevrolet Monte Carlo V6-3.5L VIN N
Engine Controls - Int. MIL ON/DTC P0128 Set
2006 Chevrolet Monte Carlo V6-3.5L VIN NSECTION Engine Controls - Int. MIL ON/DTC P0128 Set
Bulletin No.: 07-06-02-003
Date: March 07, 2007
TECHNICAL
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.
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 the table.
Disclaimer
Date: March 07, 2007
TECHNICAL
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.
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 the table.
Disclaimer
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.