2021 Audi Q5 e MIL On, DTC P0CE100 / P0CE000 TSB

Symptoms

Owners of affected Audi Q5 e vehicles may notice the "Check Engine Light (MIL) is on" illuminated on their dashboard. This warning indicates a potential issue with the vehicle's thermal management system.

Fault Codes / DTCs

When diagnosing the issue, technicians may find the following Diagnostic Trouble Codes (DTCs) stored in the Thermal Management Control Unit, J1024 (address word 00C5):

• P0CE000: "Hybrid/EV Battery Pack Coolant Control Valve 'A' Performance/Stuck Off"
• P0CE100: "Hybrid/EV Battery Pack Coolant Control Valve 'A' Performance/Stuck On"

These codes specifically point to a performance problem with the coolant control valve for the hybrid/EV battery pack.

Diagnosis / Trigger Conditions

The root cause for the "Audi Q5 e MIL P0CE100" and P0CE000 DTCs is identified as a software issue within the Thermal Management Control Unit. The vehicle's system incorrectly detects a fault with the Hybrid/EV Battery Pack Coolant Control Valve 'A' due to this software anomaly, leading to the illumination of the Check Engine Light.

Important Warnings

NOTICE: To prevent damage to high-voltage components, it is crucial to remove the high-voltage cable before entering the SVM code during the software update process. Charging the high-voltage battery while performing a software update can cause damage to these critical components.

Repair Procedure Summary

The repair involves updating the software of the Thermal Management Control Unit, J1024. Technicians must first check the currently installed software version against the new software part number and version specified in the Technical Service Bulletin 87 24 82 2067066/3. If the existing software is not at the latest version, an SVM (Software Version Management) update must be performed. This update will resolve the underlying software issue causing the "Audi Q5 e MIL P0CE100" and P0CE000 DTCs.

Required Tools or Parts

To perform the software update, technicians will utilize the SVM system with the action code C5A003. The new software part number for the Thermal Management Control Unit is 4M0 965 429 Q, with version 0305 (or higher). Older software versions include 4M0 965 429 N (version 0303) and 4M0 965 429 P (version 0304).

Warranty Information

This Technical Service Bulletin is informational only if the vehicle is outside of its warranty period. For in-warranty repairs, the service number is 8711 and the damage code is 0039. Labor operations for the software update are coded as 0151 0000, with diagnostic time for charging the battery as 2706 8950. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Superseded Bulletins

This Technical Service Bulletin, 87 24 82 2067066/3, supersedes Technical Service Bulletin Group 87 number 24-73, which was dated April 22, 2024.

Owner Action

If your 2021 Audi Q5 e is displaying the "Check Engine Light (MIL) is on" and you suspect it might be related to the "Audi Q5 e MIL P0CE100" or P0CE000 fault codes, it is recommended to schedule an appointment with an authorized Audi service center. They will be able to diagnose the issue and perform the necessary software update to the Thermal Management Control Unit.

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Source: NHTSA ID: 11005917