Network
generic / SAE
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.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number2 / AF
Possible causes
- Bus wiring open or shorted high
- Module without power or ground medium
- Module failed medium
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
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–2000 €
- Estimated time: 1–4 h
- Component: turbine inlet valve position sensor
- Component: vehicle bus wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012