OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P2C7B

Turbocharger Turbine Inlet Valve Control Performance

The turbocharger turbine inlet valve does not respond to commands within the expected time window. Mechanical resistance or actuator weakened.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberC / 7B

Possible causes

  • Increased friction in valve assembly high
  • Actuator force degraded medium

Symptoms

  • Charge status indicator shows fault
  • Charging may not start or interrupts
  • Slower-than-expected charge rate

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 400–2500 €
  • Estimated time: 2–8 h
  • Component: turbo turbine inlet valve
  • Component: wiring harness
  • Component: ecm
  • MIL / check engine light
  • emissions-relevant
  • limp mode possible

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication