2021-2023 Audi Check Engine Light U014000 U110100 TSB

Audi has issued Technical Service Bulletin (TSB) 2068037/2 to address an intermittent "check engine light sporadically lights up in instrument cluster" condition affecting various 2021-2023 Audi models. This TSB, dated October 18, 2022, supersedes an earlier bulletin, Group 97 number 22-87, from September 16, 2022.

This bulletin provides guidance for technicians when customers report that "The check engine lamp intermittently is displayed in the instrument cluster when the vehicle is started." The presence of specific Diagnostic Trouble Codes (DTCs) indicates the need for this service action.

Symptoms

Owners may observe the "check engine light sporadically lights up in instrument cluster" or that "The check engine lamp intermittently is displayed in the instrument cluster when the vehicle is started." This warning light indicates a fault within the vehicle's systems that requires attention.

Fault Codes / DTCs

When diagnosing this issue, technicians will typically find the following Diagnostic Trouble Codes (DTCs) stored in the vehicle's control units:

• DTC U014000: Lost Communication with Body Control Module. This code is stored in the engine electronics J623 (diagnostic address 0001).
• DTC U110100: Component protection active. This code is stored in the onboard supply control unit J519 (diagnostic address 0009).

Technical Background

The root cause of the check engine light and the associated DTCs U014000 and U110100 lies in the component protection system. When component protection is active, the parking aid system behaves as if Terminal 15 (ignition) is switched off. This prevents the parking aid from sending necessary messages over the vehicle's network. Consequently, the engine control unit detects this communication loss and activates the warning lamp, leading to the check engine light illumination.

Audi has implemented a software update in production to address this issue in newer vehicles. However, for affected vehicles already on the road, a specific service procedure is required.

Repair Procedure Summary

For vehicles exhibiting both DTC U014000 and DTC U110100, the primary repair involves replacing the onboard supply control unit. Technicians are instructed to use the specific replacement test plan outlined in the diagnostic system to ensure proper installation and functionality of the new module. If other DTCs related to component protection are present, these should be resolved using the corresponding test plans within Guided Fault Finding.

Required Parts or Tools

To perform the repair described in TSB 2068037/2, the following parts are typically required:

• Onboard supply control unit: One unit is needed. Technicians should refer to ETKA for the correct part number.
• Fasteners, Bolts, Nuts, and Screws: These are required as needed for the repair and should be sourced according to the repair manual and ETKA/ELSA.

Warranty Information

This repair is covered under Audi's warranty for eligible vehicles. The claim types are:

• 110: For vehicles up to 48 months or 50,000 miles.
• G10: For CPO (Certified Pre-Owned) covered vehicles, after verifying owner eligibility.

If the vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only. The service number for this operation is 9710, with a damage code of 0039. Labor operations for removing and installing/replacing the onboard supply control unit are coded 9710 1950.

Important Warnings

Audi Warranty Policies and Procedures Manual must be followed for all warranty claims. Claims are subject to review or audit by Audi Warranty.

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Source: NHTSA ID: 10225562