2021 Audi Q5 e MIL On: Thermal Management DTC P0CE100 / P0CE000

Audi has released Technical Service Bulletin (TSB) 2067066/2 to address a common issue affecting the 2021 Audi Q5 e. Owners may experience the illumination of the Check Engine Light (MIL) on their dashboard. This TSB specifically targets diagnostic trouble codes (DTCs) P0CE100 and P0CE000, which are related to the vehicle's thermal management system.

Symptoms

Owners of affected 2021 Audi Q5 e vehicles will typically notice the "Check Engine Light (MIL) is on" illuminated on their instrument cluster. This warning indicates a potential issue with the vehicle's systems, prompting further investigation.

Fault Codes / DTCs

A workshop diagnosis may reveal one or both of the following diagnostic trouble codes stored in the Thermal Management Control Unit (J1024):

• 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 point to a performance or stuck condition of the hybrid/EV battery pack coolant control valve.

Diagnosis and Technical Background

The root cause of these DTCs and the illuminated Check Engine Light (MIL) is identified as a software issue within the Thermal Management Control Unit, J1024. This software anomaly can lead to incorrect readings or operation of the Hybrid/EV Battery Pack Coolant Control Valve 'A', triggering the fault codes.

Repair Procedure Summary

The resolution for the 2021 Audi Q5 e thermal management DTC P0CE100 or P0CE000 involves updating the software of the Thermal Management Control Unit (J1024). Technicians will use the Software Version Management (SVM) system, following instructions detailed in TSB 2011732. The update process involves checking the current software version of the J1024 control unit.

If the software is not at the new part number and version, an update is performed. The old software part number 4M0 965 429 N (version 0303) will be updated to the new software part number 4M0 965 429 Q (version 0305) using SVM Code Input C5A003. It is crucial for technicians to "Always use DoIP when flashing a control module via ODIS in supported vehicles" and ensure DoIP communication is active, which can be identified by a red LED on the VAS 6154(A).

Important Warnings for Owners

• If your vehicle's Thermal Management Control Unit (J1024) already has the new software part number (4M0 965 429 Q) and version (0305), this Technical Service Bulletin 2067066/2 does not apply, and Guided Fault Findings should be followed.
• While this TSB outlines a common repair, if your vehicle is outside of its warranty period (typically 48 months or 50,000 miles), this information is provided for informational purposes only, and repair costs may not be covered by Audi.

Warranty Information

This repair, identified by Service Number 8711 and Damage Code 0039, is typically covered under warranty for vehicles up to 48 months or 50,000 miles. Certified Pre-Owned (CPO) vehicles may also be covered under claim type G10, provided ownership is verified. Labor operations include software update (0151 0000) and charging the battery (2706 8950), with no allowance for road tests before or after the procedure.

Revision History

This TSB, 2067066/2, is Revision 2, published on April 22, 2024. It supersedes Revision 1, which was published on June 13, 2022, and also supersedes Technical Service Bulletin Group 87 number 22-29 dated July 12, 2022. The primary reason for this revision was to update labor operations for warranty claims.

NHTSA ID: 10253992