G6 L4-2.4L (2007)
PROM - Programmable Read Only Memory: Customer Interest
Engine Control - MIL ON/DTCs P0171/P0300/P1174 Set
TECHNICAL
Bulletin No.: 08-06-04-001B
Date: April 21, 2009
Subject:
Check Engine Light On, DTCs P0171, P0300, P1174 Set (Perform Injector Test, Replace Injectors and Reprogram ECM, if Necessary)
Models:
2006-2007 Chevrolet Cobalt, HHR
2006 Pontiac Pursuit (Canada)
2007 Pontiac G5, G6
2006-2007 Saturn ION
with 2.4L Engine (VIN B, P - RPO LE5)
Supercede:
This bulletin is being updated to include the Pontiac Pursuit and to add an Important statement. Please discard Corporate Bulletin Number
08-06-04-001A (Section 06 - Engine /Propulsion System).
Condition
Some customers may comment on the check engine light being illuminated.
A scan tool may reveal DTC P0171, P0300 or P1174 set as current or in history.
Cause
This condition may be caused by the plugging of one or more of the injector director plate orifices which results in a lean condition.
Correction
Important
This condition cannot be corrected by cleaning the injector(s).
Important
For Chevrolet and Pontiac vehicles, reprogramming must be done using the remote method.For Saturn vehicles, reprogramming must be done
using the pass-through method.
Follow the published diagnostics in SI for any DTC recorded.
Perform an injector balance test using the Active Fuel Injector Tester (AFIT), CH-47976. Refer to the Fuel Injector Diagnosis (w/CH47976) procedure
in SI. If any injector is identified as having a lean condition, replace all four injectors with the revised injectors. After installing the new injectors,
reprogram the ECM with updated calibration files using the TIS2WEB Service Programming System (SPS) application. There are two calibration part
numbers that are valid for "Engine Operation". Select the part number with the description that reads for vehicles with second design injector. The
injector has a dark blue overmold color for this repair.
Important
The fuel injectors must be replaced and the new calibration files must be installed to ensure a complete repair. Failure to perform both repairs
will result in the customer returning with the same condition.
If a vehicle returns with the same condition after having this repair performed, the technician should first verify that the complete repair was performed
before continuing with SI diagnostics.
Parts Information
