2021-2024 Audi Gearbox Malfunction DTCs P071800 P276800

Symptoms of Audi Gearbox Malfunction

Owners of 2021-2024 Audi A4, A5, A5 Cabriolet, A5 Sportback, A6, A6 allroad, A7, and Q5 models may experience various symptoms related to a gearbox malfunction. These issues indicate a problem with the transmission system, often leading to reduced vehicle performance or functionality.

Common symptoms include:

• An instrument cluster warning message stating, "Gearbox Malfunction".
• The vehicle intermittently failing to shift up or down.
• The vehicle entering limp home mode, which limits power and speed to prevent further damage.
• An instrument cluster warning message stating, "Reverse gear unavailable".
• An instrument cluster message stating, "You can continue driving (functions limited)".

If you are experiencing an Audi A6 gearbox malfunction, it is important to have your vehicle diagnosed by a qualified technician.

Fault Codes (DTCs)

When an Audi A6 gearbox malfunction occurs, the transmission control module (TCM), also known as J217, may store specific Diagnostic Trouble Codes (DTCs). These codes help technicians pinpoint the nature of the transmission issue.

The following DTCs are associated with this TSB:

DTC Code	Description
P071800	"Input/Turbine Speed Sensor 'A' Circuit Intermittent" (Symptom Code: 20736)
P276800	"Input/Turbine Shaft Speed Sensor 'B' Circuit Intermittent" (Symptom Code: 20737)
P081100	"Excessive Clutch Slippage" (Symptom Code: 20870)
P081E00	"Clutch 2 excessive clutch slippage" (Symptom Code: 20872)

These codes are typically stored as passive/sporadic entries in the TCM.

Diagnosis and Trigger Conditions

To properly diagnose an Audi A6 gearbox malfunction, technicians will first attempt to reproduce the customer's complaint and verify the presence of the associated DTCs. A crucial step involves checking the transmission's manufacturing date.

This Technical Service Bulletin (TSB) 34 24 68 2067653/7 specifically applies to transmissions built within the date range of June 15, 2020, and November 30, 2023. The transmission production date can be found on data stamps located on the bottom of the front differential and the top of the bell housing (as illustrated in Figure 1 of the original TSB document).

Important Warnings for Owners and Technicians

Owners and technicians should be aware of specific conditions under which this TSB applies or does not apply:

• Transmission Production Date: This TSB only applies if the transmission's manufacturing date falls within June 15, 2020, and November 30, 2023. If the transmission was manufactured outside this range, this TSB is not applicable.
• DTC Status: If DTC P071800 or P276800 is stored as active/static, the repair procedure outlined in this TSB does not apply. In such cases, the ODIS test plan must be followed completely and accurately to diagnose the root cause. This TSB is only for instances where these DTCs are logged as passive/sporadic (intermittent).

Repair Procedure Summary

For vehicles experiencing an Audi A6 gearbox malfunction with intermittent DTCs P071800 or P276800, and with a transmission manufactured within the specified date range, the primary repair involves replacing the transmission control unit J217.

The general steps for the repair procedure include:

1. Initial Diagnosis: Confirm the customer complaint and verify the presence of relevant DTCs.
2. Transmission Date Check: Determine if the transmission's production date is between June 15, 2020, and November 30, 2023.
3. DTC Status Check: Ensure the DTCs (P071800 or P276800) are logged as passive/sporadic.
4. Control Unit Replacement: Replace the transmission control unit J217 according to the Workshop Manual. This typically involves using the "Replace control module" test program within the diagnostic system.
5. Post-Repair Test Drive: Conduct a road test to confirm that the concern is resolved and no further issues are present.

Required Tools or Parts

To perform the repair outlined in TSB 34 24 68 2067653/7, specific parts and tools are required:

• Control unit for 7-speed gearbox: Quantity 01. This part is ordered to VIN.
• Gasket for oil pan, Plugs, tube from oil pan to transmission cooler: These parts are ordered to VIN.
• Fasteners, Bolts, Nuts, and Screws: As needed per the Repair Manual.
• ETKA/ELSA: Electronic parts catalog for identifying specific part numbers and quantities.
• ODIS: Diagnostic system for fault code reading, guided functions, and control unit replacement procedures.

Always consult with your Parts Department and/or ETKA for the latest information and part bulletins.

Warranty Information

This repair, identified by Service Number 3511 and Damage Code 0040, is covered under Audi's warranty policies.

• Coverage: Up to 48 months or 50,000 miles, whichever comes first.
• Certified Pre-Owned (CPO) Vehicles: Covered under G10 for CPO vehicles; owner verification is required.
• Out of Warranty: If the vehicle is outside of warranty coverage, this Technical Service Bulletin serves as informational guidance only.

Labor operations include removing and installing the mechatronic unit (3511 19xx), removing and installing the control unit (3481 1950), diagnostic time (0150 0000), and road tests before (0121 0002) and after (0121 0004) the service procedure. Battery charging (2706 8950) is also included. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

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Source: NHTSA ID: 11002963