Engine Controls - MIL ON/DTCs P0420/P0430/Misfire DTCs

01 08 13

March 26, 2008

2017410





Vehicles Affected

Condition

Update Programming, MIL ON, DTCs P0420 and or P0430 Stored in ECM Fault Memory

Tip:

This software update also includes modification for:

Random engine misfire (P0300 - P03XX) DTCs.





One or more of the fault codes in the table above may be stored in the ECM Fault Memory.

Note:
^ DO NOT diagnose or replace components due to misfire faults before performing the update function as explained in this bulletin.

^ DO NOT diagnose or replace catalytic converters before performing the update function as explained in this bulletin.

Technical Background

Monitoring strategy for the catalytic converter is too sensitive causing unnecessary catalytic converter replacements.

Engine misfire diagnostic is adjusted for better catalyst protection.

Updated programming of the ECM software is based on most resent engineering experiences and makes this knowledge available for the monitoring strategies.

Production Solution

Improved software makes the monitoring strategy more accurate.

Service

Update-Programming Procedure:

Tip:

To Update-Programming using SVM, review and follow instructions in Technical Bulletin Instance 2014603 "Software Version Management".

The SVM Process must be completed in its entirety so the database receives the update confirmation response.

A warranty claim may not be reimbursed if there is no confirmation response to support the claim.





^ Update the Engine Control Module using the SVM Unit code as listed in the table above.

The procedure can be found in GFF under Functions/ Component Selection, Software Version Management, Adapting Software.

WARNING:
The electric cooling fans may be activated during the ECM updating procedure.

Tip:

The SVM Process must be completed in its entirety so the database receives the update confirmation response. A warranty claim may not be reimbursed if there is no confirmation response to support the claim or action is carried out that is not explicitly stated in the Technical Bulletin.





Ensure the ECM/TCM Tuning Form shown above has been completed and signed by customer following outlined instructions in Technical Bulletin Instance 2014603.








Warranty





Required Parts and Tools

No Special Parts required.

Additional Information

All part and service references provided in this Technical Bulletin are subject to change and/or removal. Always check with your Parts Dept. and Repair Manuals for the latest information.