Engine Controls - MIL ON/DTC P0401 Set

NUMBER: 18-014-11 REV. A

GROUP: Vehicle Performance

DATE: September 15, 2011

THIS BULLETIN SUPERSEDES SERVICE BULLETIN 18-014-11, DATED MARCH 16, 2011, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE THE ADDITION OF 2009 AND 2010 MODEL YEARS.

HELP USING THE wiTECH DIAGNOSTIC APPLICATION FOR FLASHING AN ECU IS AVAILABLE BY SELECTING 'HELP' THEN 'HELP CONTENTS' AT THE TOP OF THE wiTECH DIAGNOSTIC APPLICATION WINDOW.

THE wiTECH SOFTWARE LEVEL MUST BE AT RELEASE 12.01 OR HIGHER TO PERFORM THIS PROCEDURE.

SUBJECT:
Flash: MIL Illumination P0401 - EGR System Performance

OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.

MODELS:

**2009~2011** (KA) Nitro

**2009~2011** (KK) Liberty

NOTE:
This bulletin applies to models equipped with a 3.7L engine (sales code EKG) and an automatic transmission (DGV) built before February 23, 2011 (MDH 0223XX).

SYMPTOM/CONDITION:
Some customers may complain of MIL illumination. No other symptoms will be noted or experienced. Further investigation by the technician may find DTC P0401 - EGR System Performance is set.

DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems are functioning as designed. If DTC's other then the one listed above are present record them on the repair order and repair as necessary before proceeding further with this bulletin.





PARTS REQUIRED:

REPAIR PROCEDURE:

1. Reprogram the PGM with the latest software. Follow the detailed service procedures available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical > Electronic Control Modules - Service Information > Module - Powertrain Control > Standard Procedures > PCM/ECM Programming - Gas. After PCM reprogramming, the following must be performed:

a. Clear any DTC's that may have been set in other modules due to reprogramming. The wiTECH application will automatically present all DTCs after the flash and allow the tech to clear them.

2. Type the necessary information on the "Authorized Modification Label" p/n 04275086AB and attach it near the VECI label.

POLICY:
Reimbursable within the provisions of the warranty.





TIME ALLOWANCE:





FAILURE CODE:

Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.