Intermittent MIL/Check Engine Light On, DTC P0128 Set (Reprogram ECM) (09-06-02-004A)

Publication date: 2009-05-13
Reference number: 09-06-02-004A
Supersedes refnos: 09-06-02-004

Intermittent MIL/Check Engine Light On, DTC P0128 Set (Reprogram ECM)

TECHNICAL SERVICE BULLETIN

Reference Number(s): 09-06-02-004A, Date of Issue: May 13, 2009

Affected Model(s):	2009 Buick Enclave; 2009 Chevrolet Traverse; 2009 GMC Acadia; 2009 Saturn OUTLOOK; All Equipped with 3.6L Engine RPO LLT
Supercedes:	This bulletin is being revised to change the Warranty Information. Please discard Corporate Bulletin Number 09-06-02-004 (06 - Engine/Propulsion System).

Superceded Bulletin(s): 09-06-02-004

SERVICE INFORMATION

Built Prior to VIN Breakpoint

Model	VIN Sequence
Buick Enclave	9J191884
GMC Acadia
Saturn OUTLOOK
Chevrolet Traverse	9S143279

Condition

Some customers may comment that the SES Light is on. Upon inspection, you may find DTC P0128 (Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature) stored in the Engine Control Module (ECM).

Correction

Verify that the cooling system is filled to the proper level and that the cooling system is functioning properly. If everything is functioning properly, reprogram the ECM with a new service calibration using the TIS2WEB Service Programming System (SPS) application. As always, make sure your Tech 2® is updated with the latest software version.

Warranty Information

For vehicles repaired under the 8 year / 80,000 mile (130,000 km) emission controller warranty, use:

Warranty Information

Labor Operation	Description	Labor Time
J6353	Reprogram ECM using SPS	0.4 hr