Technical Service Bulletin (TSB)
Flash: Powertrain Control Module (PCM) Updates
REFERENCE:

TSB: 18-082-25
GROUP: 18 - Vehicle Performance

Date:

August 23, 2025

REVISION: 18-074-23

VEHICLES
AFFECTED:

2023 (D2) RAM 3500 Pickup
MARKET APPLICABILITY:
This bulletin applies to vehicles equipped with a 6.7L I6 Cummins HO
MEA
NA
Turbo Diesel Engine (Sales Code ETM) and a 6SPD Auto Aisin AS69RC
SA
IAP
HD Transmission (Sales Code DF2).
EE

CH

NOTE: **This bulletin applies
to the Enlarged Europe,
North America, South
America, India & Asia
Pacific and Middle East
markets**.
CUSTOMER
SYMPTOM:

**Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must
exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
● P245D-00 - EGR Cooler Bypass Control Circuit High.
● P02E3-00 - Diesel Intake Air Flow Control Circuit High.
● P0490-00 - EGR Control Circuit High.
● P229F-00 - Aftertreatment NOX Sensor Circuit Performance - Bank 1 Sensor 2.
● P0299-00 - Turbocharger Underboost.
● P242F-00 - Diesel Particulate Filter Restriction - Ash Accumulation.
● P0128-00 - Thermostat Rationality.
● P0234-00 - Turbocharger Overboost Condition.**
Customers may also comment on one or more of the following:
● **Engine speed unstable when vehicle is stationary, not in gear and running on high speed governor (max
engine speed).**
● Longer crank time than normal.
● Transmission overheat conditions with a message displayed in the Instrument Panel Cluster (IPC) stating
"Transmission oil temperature is too hot".

CAUSE:

PCM software

This bulletin supersedes Technical Service Bulletin (TSB) 18-074-23, date of issue June 17, 2023,
which should be removed from your files. All revisions are highlighted with **asterisks** and include
new DTCs, Customer Symptom, Market Note, LOP, updated RSU statement, Claims Data, Diagnosis
sections and Repair Procedure. Revisions not highlighted with **asterisks** include removal of a
vehicle, model year and engine Sales Code.
**This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU)
23-178, date of issue June 17, 2023. All applicable RSU VINs have been loaded. To verify this RSU
service action is applicable to the vehicle, use VIP or perform a VIN search in DealerCONNECT/
Service Library. All repairs are reimbursable within the provisions of warranty.**

M18 FSAR-TSB-6236

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REPAIR SUMMARY:
This bulletin involves reprogramming the Engine Control Module (ECM/PCM) with the latest available
software.
CLAIMS DATA:

Labor Operation No:
**18-19-04-TS

Failure Code

Labor Description
Module, Engine Control
(ECM) - Reprogram
(0 - Introduction)
CC

Skill Category
10 - Diesel

Labor Time
0.4 Hrs.**

Customer Concern

**The dealer must use failure code CC with this Technical Service Bulletin.
● If the customer’s concern matches the SYMPTOM identified in the Technical Service Bulletin, failure code
CC is to be used.
● When utilizing this failure code, the 3C’s (customer’s concern, cause and correction) must be provided for
processing Technical Service Bulletin flash/reprogramming conditions.**
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in DealerCONNECT/
Service Library, verify all related systems are functioning as designed. If DTCs or symptom conditions, other
than the ones listed above are present, record the issues on the repair order and repair as necessary before
proceeding further with this bulletin.
**If the customer describes any of the symptoms listed above in the customer symptom section, perform the
Repair Procedure.**
SPECIAL TOOLS/EQUIPMENT:

Description
wiTECH or Equivalent

Ref. No.
–

Notes
–

REPAIR PROCEDURE:
NOTE: Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow
the charging voltage to climb above 13.5 volts during the flash process.
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
1. **Reprogram the ECM/PCM with the latest software. If issues arise when flashing a module using the
wiTECH Diagnostic Application, please submit a ticket to the Helpdesk. The helpdesk can be found within
the Help menu.
2. Clear any DTCs that may have been set in any modules due to reprogramming. The wiTECH application
will automatically present all DTCs after the flash and allow them to be cleared.
NOTE: For SA market only, after applying this TSB, it is not necessary to send DID-I or DID-A.**

-3-

M18 FSAR-TSB-6236

POLICY:
Reimbursable within the provisions of the warranty.
This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.