OBD-II code · Network
U02AF Lost Communication With Turbocharger Turbine Inlet Valve Position Sensor
The vehicle bus reports loss of communication with the turbocharger turbine inlet valve position sensor. Position feedback for variable inlet geometry on twin-scroll/sequential turbo systems is missing.
Is it safe to drive with U02AF?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Turbine Inlet Valve Position Sensor, Vehicle Bus Wiring
Related codes
- U02ACLost Communication With Turbocharger/Supercharger Boost Control A
- U02ADLost Communication With Turbocharger/Supercharger Boost Control B
- U02AELost Communication With Hybrid/EV Battery Coolant Pump
- U02B0Lost Communication With Turbocharger/Supercharger Boost Control B Position Sensor
- U02B1Lost Communication With Comfort and Convenience Display A
- U02B2Lost Communication With Comfort and Convenience Display B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.