S2108000121 REV.B Service Bulletin/Repair Instructions

Case Number: S2108000121 - Rev. B

Release Date:
February 2026
Models Affected:

2021-2025 Jeep Wrangler 4XE (JL)

2022-2025 Jeep Grand Cherokee 4XE (WL)
Symptom/Vehicle Issue: Check Engine Light On And Service Hybrid System

Displayed. P0A0A-00 High Voltage System Interlock Circuit “A” Is Active
Discussion: If one or more of the HVIL(High Voltage Interlock Loop) connectors was

disconnected during a repair of the Hybrid System. Upon completing the repair, you

may find DTC P0A0A-00 High Voltage System Interlock Circuit “A” Active even though

proper torque of the HVIL connectors was achieved.

While proper torque may have been achieved, it is possible the HV connector did not

seat properly.
Repair: Engineering has recommended the following procedure be followed when

removing and installing ANY of the High Voltage connectors.

Inspect the HVIL connector seals for damage or tears and the terminals for spread

contacts. If any of the High Voltage connectors seals are damaged, the wiring harness

will need to be replaced. If HVIL terminals appear to be spread or damaged, HV

component replacement will be necessary. Contact STAR for assistance.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

FCA US LLC
Version 4.3 10/28/2020
Spread HVIL Terminals
Damaged HV Connector Seal
If no issues are found, continue with the installation procedure described below.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

FCA US LLC
Version 4.3 10/28/2020
A Torque Wrench MUST Be Used
Installation of HVIL Connector: Turn the HVIL connector bolt one revolution while

applying forward pressure and wiggling the connector, push it firmly so that it is

completely seated. Ensure the connector is seating square to the connector housing.

The Power Inverter Module (PIM) C3 connecter is especially prone to being installed at

an angle. Before torquing down the bolt, confirm that the C3 is fully and squarely

seated by utilizing the 3 windows provided around the orange plastic colored shield of

the connector. There should be no empty space when looking through the window.

When fully seated, only the aluminum PIM housing should be seen. Review the images

below.
C3
PIM C3 Connector Location
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

FCA US LLC
Version 4.3 10/28/2020
Not Good: Air Gap in Window
Good: No Air Gap in Window
Failure to squarely and fully seat the connector before torquing down the bolt

can result in HVIL terminal damage
Once the connector is in fully seated position, hand start the fastener and drive it until

the specified torque of 80 In-Lbs. or 9 Nm is achieved.

If the torque specification cannot be reached. The threads for the HVIL bolt may be

stripped. The threads can be re tapped using a M6x1.0 Tap.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

FCA US LLC
Version 4.3 10/28/2020
Verification: If the HVIL connector was improperly seated initially. The torqueing

procedure above should have allowed the HVIL terminals to make proper contact. The

P0A0A-00 should now be stored and able to be cleared. If the DTC is still active,

standard diagnostic procedures should be followed.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online

does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear

to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the

appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no

solution is found

FCA US LLC
Version 4.3 10/28/2020

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Last update on 2026-03-20 / Affiliate links / Images from Amazon Product Advertising API

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