17125 on Audi
Torque Converter Clutch Circuit: Performance or Stuck Off
17125 on Audi vehicles indicates torque converter clutch circuit: performance or stuck off. Au7o has documented this code across 1 Audi model — most commonly on A8. VAG fault code 17125 is the manufacturer equivalent of the generic OBD-II code P0741. It indicates the transmission/engine control module has detected that the torque converter clutch (TCC) is not engaging properly or is stuck off, meaning lock-up is not occurring as commanded. It is typically set when the slip difference between engine speed and transmission input/turbine speed exceeds the expected threshold during commanded lock-up. Typical repair costs on Audi range from $900 to $5,500, depending on the specific model and root cause.
Common Causes of 17125
- •Failed or worn torque converter / TCC lock-up clutch (internal mechanical wear)
- •Faulty torque converter clutch solenoid or valve body issue
- •Low or degraded/contaminated automatic transmission fluid
- •Stuck or sticking TCC control valve in the valve body
- •Wiring or connector faults in the TCC solenoid circuit
- •Internal transmission failure or worn clutch/seals affecting lock-up
17125 on Audi by Model
Audi A8(1 issue)
- ZF 6HP26 Automatic Transmission Torque Converter Shudder and Failure2004-2010
Multiple D3-generation A8 owners report shuddering, slipping, delayed engagement, and harsh shifting traced to the ZF 6HP26 automatic transmission, especially the torque converter lock-up clutch. The problem often begins as a light vibration at steady cruise or a flare on 3-4/4-5 shifts, then progresses to fault codes and limp mode. Audi/ZF service literature and independent repair databases document valve body wear and torque converter clutch deterioration as recurring causes.
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What does 17125 mean on Audi?▼
17125 stands for "Torque Converter Clutch Circuit: Performance or Stuck Off." VAG fault code 17125 is the manufacturer equivalent of the generic OBD-II code P0741. It indicates the transmission/engine control module has detected that the torque converter clutch (TCC) is not engaging properly or is stuck off, meaning lock-up is not occurring as commanded. It is typically set when the slip difference between engine speed and transmission input/turbine speed exceeds the expected threshold during commanded lock-up. On Audi specifically, this code is documented across 1 model.
What causes 17125 on Audi vehicles?▼
Common causes on Audi: Failed or worn torque converter / TCC lock-up clutch (internal mechanical wear), Faulty torque converter clutch solenoid or valve body issue, Low or degraded/contaminated automatic transmission fluid, Stuck or sticking TCC control valve in the valve body, Wiring or connector faults in the TCC solenoid circuit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix 17125 on a Audi?▼
Repair costs on Audi range from $900 to $5,500, depending on the specific model and root cause.
Which Audi models have 17125 documented?▼
Au7o has documented 17125 on 1 Audi model: A8.