Flash: Powertrain Control Module (Pcm) Updates DTC P2066 Set (18-009-25)

Publication date: 2025-03-01
Reference number: 18-009-25

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES DTC P2066 SET

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-009-25, Date of Issue: March 01, 2025

CHRYSLER:	2024 (WL) Jeep Grand Cherokee/Grand Cherokee L
GROUP:	18 - Vehicle Performance

VEHICLES AFFECTED

2024 (WL) Jeep Grand Cherokee/Grand Cherokee L

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

CUSTOMER SYMPTOM

Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC):

P2066 - Fuel Level Sensor 2 Performance.

Customers may experience the following:

When overriding the electric park brake (EPB) while it remains engaged due to unbuckled seat belt in Drive or Reverse, the high torque request with the parking brake engaged may lead to Rear Drive Unit (RDU) damage/broken.

CAUSE

PCM Software

REPAIR SUMMARY

This bulletin involves reprogramming the PCM with the latest available software.

CLAIMS DATA

CLAIMS INFORMATION

Labor Operation No:	Labor Description	Skill Category	Labor Time
18-19-06-96	Module, Powertrain Control (PCM) - Reprogram (0 - Introduction)	1 - Engine Repair And Performance	0.3 Hrs.
Failure Code	CC	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

SPECIAL TOOLS INFORMATION

Description	Ref. No.	Notes
wiTECH or Equivalent	-	-

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.

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.
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.