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TSB 18-028-05 REV. A

Flash: Diagnostic Trouble Code P0430, P0420 - Catalyst Efficiency

Superseded by TSB 18-016-07 - Left for information only.

Visit Geno's Garage for Truck accessories.

Date: July 20, 2005

THIS BULLETIN REVISES SERVICE BULLETIN 18-028-05, DATED JUNE 14, 2005 WHICH
SHOULD BE REMOVED FROM YOUR FILES. THIS REVISIONS ADDS A NEW PART
NUMBER FOR AN OXYGEN SENSOR OMITTED FROM THE ORIGINAL BULLETIN.

THE DRBIII FLASH FILES FOR THIS BULLETIN ARE AVAILABLE ON DealerCONNECT.

FOR MARKETS OUTSIDE OF THE UNITED STATES AND CANADA, THE FLASH FILES
AND REPROGRAMMING INSTRUCTIONS WILL BE AVAILABLE ON ITIL/ISIS DVD
AUGUST, 2005.   

Models: 2005 (DR/DH) Ram Truck

NOTE: This Bulletin Applies To Vehicle Equipped With 5.7L engines (Sales Code EZA)
built on or before June 1, 2005 (MDH 0601XX).

Overview:
This bulletin involves reprogramming the Powertrain Control Module (PCM) and replacing the
downstream oxygen sensor.

Symptom/Condition:
Customers may experience a MIL light with Diagnostic Trouble Code (DTC) - P0430 or P0420 -
Catalyst Efficiency.

Diagnosis:
If the DTC is present, perform the Repair Procedure.

Parts Required:

Qty.	Part No.	Description
1	56029049AA	Oxygen Sensor, DR 1500
1	56029050AA	Oxygen Sensor, DH 2500/3500
1	04275086AB	Label, Authorized Modification

Special Tools/Equipment Required:

NOTE: An updated J1962 cable has been released. This cable has a red colored
connector at the DRBIIIT connection. Use this cable whenever a flash is being
performed.

Repair Procedure: 

Using the procedure outlined on TechCONNECT, remove the downstream oxygen sensor and
install the appropriate part number listed above.

REPAIR PROCEDURE USING DealerCONNECT:

NOTE: Whenever a module is reprogrammed, the software in the DRBIII; must be
programmed with the latest revision level available.

NOTE: If this flash process is interrupted/aborted, the flash process should be
restarted and then follow the directions on the DRBIII.

The reprogramming procedure requires access to software and equipment that most owners do not have. The very long and involved programming procedure will not be posted here. To see the specific instructions, you can obtain or view a copy of this TSB at your dealership.

NOTE: Due to the PCM programming procedure, a DTC may be set in other modules
(TCM, BCM, MIC, SKIM, etc.) within the vehicle, if so equipped. Some DTC’s
may cause the MIL to illuminate. Check all modules using “Module Scan”,
record the DTC’s, and erase these DTC’s prior to returning the vehicle to the
customer. Erase any DTC’s in the PCM only after all other modules have had
their DTC’s erased.

NOTE: The following step is required by law.

Type the necessary information on the “Authorized Modification Label” p/n 04275086AB
and attach near the VECI label (Fig. 1).

FIGURE 1 - AUTHORIZED MODIFICATION LABEL 1 - POWERTRAIN CONTROL MODULE P/N (INSERT P/N) USED 2 - CHANGE AUTHORITY: TSB XX-XXX-XX 3 - DEALER CODE: XXXXX 4 - DATE: XX-XX-XX

Policy:    Reimbursable within the provisions of the warranty.

Time Allowance:

Failure Code:

This page was edited on: July 31, 2007