2022-2026 Audi e-tron GT Stuck Dog Clutch TSB 2073490/4

Owners of 2022-2026 Audi e-tron GT vehicles may experience issues related to an Audi e-tron GT stuck dog clutch, leading to various transmission and performance problems. Technical Service Bulletin (TSB) 2073490/4, released on February 5, 2025, provides detailed information for diagnosing and resolving these concerns.

This TSB specifically covers situations where the dog clutch becomes stuck, resulting in specific diagnostic trouble codes (DTCs) and noticeable driving symptoms. The repair involves a software update and a thorough diagnostic process to ensure proper vehicle function.

Symptoms of a Stuck Dog Clutch

If your Audi e-tron GT is affected by an Audi e-tron GT stuck dog clutch, you might notice one or more of the following:

• A warning message displayed in the instrument cluster stating: "Gearbox fault message shown in vehicle -> vehicle does not switch to second gear and max. speed is restricted to 74 mph."
• Unusual noises or vibrations originating from the electric drive on the rear axle.
• A message indicating: "Gearbox malfunction: you can continue driving. Please contact workshop" or a similar alert.
• The vehicle may fail to shift into second gear.

Diagnostic Trouble Codes (DTCs)

When a dog clutch is stuck, the Engine Control Module (-J623-, address word 0001) will store specific diagnostic trouble codes (DTCs). These codes can be intermittent (passive) or persistent (static) and often appear in combination.

Diagnostic address	Diagnostic trouble code	Fault symptom	Storage state
0001 - Engine electronics	P1D4500	Disk clutch 2nd gear Time exceeded for opening	Intermittent/static
0001 - Engine electronics	P1D2E00	Dog clutch Time exceeded for display	Intermittent/static
0001 - Engine electronics	P1D2D00	Dog clutch Display attempt failed	Intermittent/static
0001 - Engine electronics	P1C9800	Electrical transmission actuator blocked	Intermittent/static
0001 - Engine electronics	P101E00	Engine speed limitation due to excess temperature	Intermittent/static

It is important to note that DTC entries P1D2E00, P1D4500, and P1D2D00 must occur together and be logged as both passive/intermittent and active/static to confirm the issue.

Diagnosis and Trigger Conditions

To diagnose an Audi e-tron GT stuck dog clutch, technicians will perform several checks. This includes verifying if the dog clutch is actively engaged and if the vehicle is unable to shift into second gear. A key diagnostic step involves checking the frequency counter for the above DTC entries under "Standard ambient conditions."

If any DTC has a frequency count of 5 or more, the technician may inquire if the vehicle was frequently parked on a slope before the fault occurred. This information helps in understanding the conditions that might trigger the issue.

Important Warnings for Technicians

The TSB includes several warnings to ensure safety during diagnostic and repair procedures:

• Test Drive Procedure: "Accelerate the vehicle from stationary to a maximum speed of 31 mph and perform a load change by pressing the accelerator. In parallel, please have a second person use an ODIS tester to check whether the vehicle shifts into second gear. If this is the case, the dog clutch was released successfully. The procedure can be aborted or repeated at any time."
• Road Test Safety: "Using application programs when driving can be distracting. If the driver is distracted, this can lead to accidents and injuries. Observe the road traffic regulations. They have priority over any driving instructions. Always perform a road test with a second person who operates the test equipment. Make sure that the test equipment in the vehicle does not distract the driver."
• Securing Test Equipment: "Danger due to the transport of unsecured test equipment. If the test equipment is transported unsecured or in the range of airbags, this could cause injuries in certain maneuvers or in the event of an accident. Make sure the test equipment is secured properly. Do not transport test equipment in areas in which airbags inflate. If possible, use test equipment on the rear seat bench. If there is no rear seat bench, keep test equipment flat on the passenger's lap and operated exclusively by them. Move the passenger seat as far back as possible."

Repair Procedure Summary

The repair for the Audi e-tron GT stuck dog clutch is divided into two main sections:

Section 1: Software Update

The primary step involves a software update for the vehicle, specifically related to campaign 91VT. This update aims to address the underlying software logic that may contribute to the dog clutch issue.

Section 2: Vehicle Health Check and Guided Fault Finding

After the software update, technicians will check the vehicle's health based on event memory entries. The procedure identifies a stuck dog clutch based on the presence of DTCs P1D2E00, P1D4500, and P1D2D00. If these DTCs are present and meet specific frequency criteria, a Guided Fault Finding process will be performed.

Warranty Information

For vehicles outside of warranty, this Technical Service Bulletin (TSB 2073490/4) serves as informational guidance only. For eligible vehicles, warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

• Service Number: 9340
• Damage Code: 0010
• Labor Operations:
  • Check Transmission Unit: 3435 0199 (70 TU)
  • Guided Fault Finding (GFF): 0150 0060 (Labor according to the diagnostic log)
  • Test drive before service procedure: 0121 0002 (10 TU)
  • Test drive after service procedure: 0121 0004 (10 TU)
• Claim Comment: As per TSB 2073490/4

What Owners Should Know

If you frequently park your Audi e-tron GT on a slope, Audi recommends a specific procedure to help prevent potential issues. Always activate the electromechanical parking brake before releasing the foot brake and exiting the vehicle. This action blocks the rear wheels, and the parking lock function engages immediately after the rear wheels are blocked by the parking brake.

Revision History

This TSB has undergone several revisions:

• Revision 4 (February 5, 2025): Revised Warranty (Updated Warranty Table) and Revised Service (Updated measure).
• Revision 3 (October 28, 2024): Revised Service (Updated measure).
• Revision 2 (September 18, 2024): Revised Service (Updated measure).

This information is based on Audi Technical Service Bulletin 2073490/4.

Source: NHTSA ID: 11015722