2021-2022 Audi Q5, A6 P17EF00 Gearbox Control Unit Fault

Symptoms of the P17EF00 Fault

Owners of affected 2021-2022 Audi Q5 and A6 models may not experience direct symptoms that they can immediately identify. Instead, the issue typically manifests as diagnostic event memory entries. These entries are logged in the gearbox control unit, specifically indicating that the auxiliary hydraulic pump's adaptation routine is not starting automatically. This condition, identified by the Audi P17EF00 gearbox control unit fault, often arises after replacing gearbox-related components or during other gearbox service procedures.

Fault Codes / DTCs

The primary diagnostic trouble code (DTC) associated with this issue is:

• P17EF00: Hydraulic pump cannot be adapted

This code will be stored in the gearbox control unit (Transmission Electronics J217) and points directly to the problem with the auxiliary hydraulic pump's calibration.

Diagnosis and Trigger Conditions

The Audi P17EF00 gearbox control unit fault is usually detected during workshop diagnostic procedures. Technicians will find event memory entries related to the calibration of the auxiliary hydraulic pump. The core problem is that the automatic adaptation routine for this pump, which should start when the gearbox control unit is activated, is interrupted and fails to complete. This interruption prevents the necessary calibration from occurring, leading to the stored P17EF00 fault.

Important Warnings for Technicians and Owners

Audi has issued specific instructions regarding the repair process:

• DoIP Communication: "Always use DoIP when flashing a control module via ODIS in supported vehicles." This ensures proper communication during the software update. Technicians can confirm DoIP is active by observing a red LED on the VAS 6154(A) diagnostic tool. This setting will automatically reset after the diagnostic session.
• Warranty Coverage: "If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only." This means that repairs for vehicles no longer under warranty may incur charges to the owner.

Repair Procedure Summary

The resolution for the Audi P17EF00 gearbox control unit fault involves updating the software of the Transmission Electronics (J217) control unit. This update ensures the auxiliary hydraulic pump's adaptation routine can complete successfully.

The repair procedure, detailed in Audi Technical Service Bulletin (TSB) 2074823/1, requires the following steps:

1. Prepare for Software Update: Ensure the vehicle's battery is adequately charged to prevent interruptions during the flashing process.
2. Activate DoIP: Technicians must activate DoIP (Diagnosis over Internet Protocol) communication via ODIS, following the instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
3. Perform Software Update: Update the Transmission Electronics (J217) using the specified SVM action code 02A223.

The software update will replace the existing software with a newer version. For example:

• Audi Q5 (2021): Old Software Part Number 80A927155DQ (Version 0002) will be updated to New Software Part Number 80A927155DQ (Version 0003).
• Audi A6 (2022): Old Software Part Number 4K0927156BD (Version 0002) will be updated to New Software Part Number 4K0927156BD (Version 0003).

Required Tools or Parts

The primary tools required for this repair are the Audi diagnostic system (ODIS) and the VAS 6154(A) interface for DoIP communication. No specific replacement parts are typically needed for this software-related fix, as the issue is resolved by updating the existing control unit's programming.

Warranty Information

For vehicles still under warranty, this repair should be covered. Audi specifies the following details for warranty claims related to TSB 2074823/1:

• Service Number: 3511
• Damage Code: 0016
• Labor Operations:
  • Software update: 0151 0000
  • Charge battery: 2706 8950
• Claim Comment: As per TSB 2074823/1

If your vehicle is outside of its warranty period, this bulletin serves as informational guidance, and you may be responsible for the cost of the repair.

Owner Action

If you own a 2021 Audi Q5, Q5 e quattro, Q5 Sportback, or a 2022 Audi A6, A6 allroad, and suspect an issue with your gearbox or have had diagnostic work performed that revealed the P17EF00 fault, it is recommended to contact an authorized Audi dealership. They can perform the necessary diagnostic checks and apply the software update as outlined in TSB 2074823/1.

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Source: NHTSA ID: 11007309