Technical Service Bulletin (TSB)
Flash: Auxiliary Hybrid Control Processor (AHCP) /
Hybrid Control Processor (HCP) Flash Updates
REFERENCE:

TSB: 08-086-26
GROUP: 08 - Electrical

Date:

February 28, 2026

VEHICLES
AFFECTED:

2023 (RU) Chrysler Pacifica / Voyager
This bulletin applies to vehicles equipped with a 3.6L V6 Plug-In
Hybrid Engine (Sales Code EH3) and EFLITE SI-EVT Transmission
(Sales code DFQ).

REVISION: —

MARKET APPLICABILITY:
NA

MEA

SA

IAP

EE

CH

NOTE: This bulletin applies to
North America 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):
● P0E15-00 - Hybrid-EV Battery Pack Coolant Heater A Control Performance.
● P29BB-00 - Hybrid-EV Battery Pack Coolant Heater A Control Performance.
Customers may also comment on one or more of the following:
● Vehicle does not start / engine does not crank.
● Extended engine cranking time when starting the vehicle.
● Loss of heat from the engine.

CAUSE:

AHCP/HCP software updates

REPAIR SUMMARY:
This bulletin involves reprogramming the AHCP and then the HCP with the latest available software.
CLAIMS DATA:

Labor Operation No:
18-19-86-BR

Failure Code

Labor Description
Processor, Hybrid
Control (HCP/AHCP) Reprogram
(0 - Introduction)
CC

Skill Category
6 - Electrical and Body
Systems

Labor Time
0.3 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.

B08 FSAR-TSB-6942

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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 the symptom/condition above, perform the repair procedure.
SPECIAL TOOLS/EQUIPMENT:

Description
wiTECH or Equivalent

Ref. No.
–

Notes
–

REPAIR PROCEDURE:
WARNING!
● Before performing the software reprogramming, it is necessary to make the vehicle safe.
● When performing repairs that directly involve or imply possible contact with live high voltage
components/systems, the technician must ensure that the power supply of the high-voltage system
is disconnected throughout the operation.
● Only specifically trained technicians qualified to perform repairs on vehicles with high voltage
systems under current national laws/regulations are authorized to work on the vehicle.
● Before performing any diagnostic repair work on the vehicle, carefully read and comply with
the general instructions for working safely on hybrid/electric vehicles and use suitable general
equipment and Personal Protective Equipment (PPE).
NOTE: Install a 12v battery charger to ensure sufficient battery voltage is provided during the flash
process.
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
WARNING!
The vehicle must not be connected to a high voltage charger when performing software updates.
NOTE: The AHCP must be reprogrammed first prior to reprogramming the HCP. The AHCP will
temporarily go offline when reprogrammed and will come back online once the HCP
reprogramming is completed. Do not continue with the HCP reprogramming if the AHCP
reprogramming has failed, has been interrupted, or was unsuccessful due to internet failure
or power loss. If failure occurs during AHCP reprogramming, please contact STAR.
1. Reprogram the AHCP 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.
2. Reprogram the HCP 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.
3. 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.

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B08 FSAR-TSB-6942

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.