Engine Controls - MIL ON/DTC P0455 Is Set

06-086

July 21, 2011

Applies To: See VEHICLES AFFECTED

MIL Comes On With DTC P0455

(Supersedes 06-086, dated May 23, 2007, to update the information marked by the black bars)





REVISION SUMMARY

SYMPTOM

The MIL comes on with DTC P0455 (evaporative emissions system large leak detected).

PROBABLE CAUSE

The ECM/PCM misinterprets FTP (fuel tank pressure) sensor input during high load and heavy throttle application, setting DTC P0455.

CORRECTIVE ACTION

Update the PGM-FI software with the HDS.





VEHICLES AFFECTED





WARRANTY CLAIM INFORMATION





SOFTWARE INFORMATION

DIAGNOSIS

1. Use the HDS to retrieve the DTC P0455 freeze data and/or the on-board snapshot.

2. Compare the MAP sensor voltage to the BARO sensor voltage:

^ If the two readings are within 0.05 volt of each other, go to REPAIR PROCEDURE.

^ If the two readings are not within 0.05 volt of each other, this service bulletin does not apply; continue with normal troubleshooting.

REPAIR PROCEDURE

Update the PGM-FI software with the HDS and software version 2.009.007 or later. Refer to Service Bulletin 01-023, Updating Control Units/Modules.





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