P176B: Manufacturer-Specific Transmission/Powertrain Fault
10 vehicles · 5 makes · $180-$8,000 repair
Most Reported On
P176B is an OBD-II diagnostic trouble code meaning “Manufacturer-Specific Transmission/Powertrain Fault.” P176B is a manufacturer-specific powertrain code (the exact definition varies by automaker) that is generally associated with the transmission control system, most commonly reported on GM vehicles in connection with an intermediate/transmission speed-sensor performance fault. In broad terms it means the transmission controller saw a speed or ratio signal that did not behave as expected during operation. Because the precise meaning depends on the make and model, the vehicle's service manual or a dealer-level scan tool is needed to confirm the exact fault. This code is most commonly reported on 2008-2017 Audi A5 (Premium, Premium Plus, Prestige), 2009-2020 Audi A4, and 2008-2024 Audi R8, plus 7 other vehicles, with repair costs ranging from $180 to $8,000.
Common Causes
Typical Repair Cost
Based on 11 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
P176B does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
Vehicles Affected (10)
S-Tronic/DSG Mechatronic Unit Failure
S-Tronic (DSG) Mechatronic Unit Issues
S-tronic Transmission Actuator Failure
DQ250 DSG Mechatronic Unit Failure
DQ381 S-Tronic Mechatronic Unit Failure
DQ381/DQ250 S tronic Mechatronic or Internal Transmission Fault Causing No-Drive, Jerking, or Gearbox Warning
FAQ
What does P176B mean?
P176B stands for "Manufacturer-Specific Transmission/Powertrain Fault." P176B is a manufacturer-specific powertrain code (the exact definition varies by automaker) that is generally associated with the transmission control system, most commonly reported on GM vehicles in connection with an intermediate/transmission speed-sensor performance fault. In broad terms it means the transmission controller saw a speed or ratio signal that did not behave as expected during operation. Because the precise meaning depends on the make and model, the vehicle's service manual or a dealer-level scan tool is needed to confirm the exact fault.
What are the most common causes of P176B?
The most common causes of P176B are: Faulty transmission/intermediate speed sensor, Damaged wiring or connectors in the sensor circuit, Low or degraded transmission fluid, Internal transmission wear causing ratio errors, Valve body or solenoid control issues, Faulty transmission control module (TCM). The specific cause varies by vehicle.
How much does it cost to fix P176B?
Repair costs for P176B range from $180 to $8,000, depending on the vehicle and root cause.
Which vehicles are affected by P176B?
Au7o has documented P176B across 10 vehicle models from 5 manufacturers: Audi, CUPRA, SEAT, Skoda, Volkswagen.
Sources (10)
- NHTSANHTSA 2018 Audi A5 Recall Inventory
- NHTSANHTSA Vehicle Safety Research Portal - no A4-specific primary support identified for the archived aggregation
- NHTSANHTSA Audi R8 Campaign Inventory
- NHTSANHTSA 2020 Audi S3 Recall Inventory
- articleVW/Audi 0GC DQ381 DSG Mechatronic Failures — Symptoms, Fault Codes & Fixes (eco-torque)
- ForumDQ381 mechatronics issues — VW R Owners Club (VWROC)
- ForumDQ381 P060700 Error Transmission — VWROC
- ForumDSG Getriebeprobleme ARTEON - MOTOR-TALK
- Forum2018 Arteon DSG Gearbox malfunction problem - UK Volkswagen Forum
- NHTSANHTSA 2020 Audi A3 Recall Inventory
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.