Engine Controls - MIL ON/No Driving Issues/DTC P0172

MIL Lamp Illuminates with No Driveability Concerns (Reprogram PCM)
# 99-06-04-031 - (Aug 16, 1999)

Models:
1998 Chevrolet Venture
1998 Oldsmobile Silhouette
1998 Pontiac Transport/Montana

with 3.4 L Engine (VIN E - RPO LA1)

Condition

Some owners may comment on an intermittent illuminated MIL with no driveability concerns experienced. Upon checking, a Diagnostic Trouble Code (DTC) P0172, Fuel Trim System Rich Bank 1, may be found. Service Information Manual diagnosis tables may lead to "notes on intermittents".

Cause

Values within the PCM calibration may cause a DTC P0172 to set when the vehicle is operating per design and intent.

Correction

A revised calibration has been released to correct this concern. Reprogram the PCM using the appropriate calibration.





Parts Information

Warranty Information





For vehicles repaired under warranty use the table.





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