PI1409

Bulletin No.: PI1409
Date: Feb-2015
Subject:
Malfunction Indicator Lamp (MIL) Illuminated with DTCs P2096 and/or P0621 Set
Models:
2015 Chevrolet Impala (VIN 1), Malibu
Equipped with 2.5L Engine (RPO LKW)
Built Prior to December 1, 2014
Condition/Concern
Some customers may comment on the malfunction indicator lamp (MIL) being illuminated. Technicians may find diagnostic trouble codes (DTCs) P2096: Post
Catalyst Fuel Trim System Low and/or P0621: Generator L-Terminal Circuit set as current or history.
Recommendation/Instructions
If following the diagnostic instructions for these DTCs listed above in Service Information (SI) does not lead to a root cause, update the Engine Control Module
(ECM) software.
An updated software calibration has been released to address these concerns. Reprogram the K20 Engine Control Module (ECM) using the Service
Programming System (SPS) with the latest calibrations available on TIS2WEB.
Warranty Information
For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor Operation
Description
Labor Time
2810075
Engine Control Module Reprogramming with SPS
Use Published Labor
Operation Time
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may
occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that
your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
1