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

TSB: 18-029-25 REV. A
GROUP: 18 - Vehicle Performance

Date:

July 8, 2025

VEHICLES
AFFECTED:

2023 (JT) Jeep Gladiator
This bulletin applies to vehicles equipped with the 3.6L V6 24V VVT
Engine Upg I W/ESS (Sales Code ERC).

REVISION: 18-029-25

MARKET APPLICABILITY:
NA

MEA

SA

IAP

EE

CH

NOTE: **This bulletin applies to
the China market.**
CUSTOMER
SYMPTOM:

Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must
exhibit/set the following Diagnostic Trouble Code (DTC):
● P0129 - Barometric Pressure Out Of Range Low.
Customers may also comment on the following:
● Car jerks during acceleration at low speed.

CAUSE:

PCM Software

This bulletin supersedes Technical Service Bulletin (TSB) 18-029-25, date of issue June 10, 2025,
which should be removed from your files. All revisions are highlighted with **asterisks** and include a
markets Note, converting the TSB to an RSU, updated Repair Summary statement and new LOPs.
**This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU)
25-128, date of issue June 08, 2025. 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.**
REPAIR SUMMARY:
**This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.**
CLAIMS DATA:

Labor Operation No:
**18-19-06-TI

18-19-06-TO

Failure Code

Labor Description
Module, Powertrain
Control (PCM) - Inspect
(0 - Introduction)
Module, Powertrain
Control (PCM) - Inspect
and Reprogram**
(0 - Introduction)
**RF
CC

Skill Category
1 - Engine Repair And
Performance

Labor Time
0.2 Hrs.

1 - Engine Repair And
Performance

0.3 Hrs.

Required Flash - RSU
Customer Concern**

**The dealer must choose which failure code to use depending on if this is a Rapid Service Update
(RSU) or Technical Service Bulletin.
● The “RF” failure code is required for essential module flash/reprogramming and can only be used after
confirmation that the VIN is included on the RSU.
● The failure code “RF” (Required Flash) can no longer be used on Technical Service Bulletin flashes. The
“RF” failure code must be used on an RSU.
● If the customer’s concern matches the SYMPTOM/CONDITION identified in the Technical Service Bulletin,
failure code CC is to be used. When utilizing this failure code, the 3C’s must be supplied.**
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 a customer’s VIN is listed in VIP or your RSU VIN list, perform the repair. If any vehicle not on the VIN list
exhibits any of the symptom 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. **Is the vehicle on the RSU VIN list?
● YES >>> Proceed to Step 2.
● NO >>> Proceed to Step 3.
2. Is the PCM updated to the latest software level?
● YES >>> This bulletin is complete. Use Inspect LOP (18-19-06-TI) to close this active RSU.
● NO >>> Proceed to Step 3**.
3. Reprogram the PCM with the latest available 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.
4. Clear all DTCs that may have been set in any module due to reprogramming. The wiTECH application will
automatically present all DTCs after the flash and allow them to be cleared.
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.