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

P0901

Clutch Actuator Circuit Range/Performance

The clutch actuator does not meet performance criteria during commanded movement, indicating mechanical or hydraulic resistance beyond expected range.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number9 / 01

Possible causes

  • Actuator worn or sluggish high
  • Clutch disc worn beyond adaptation medium
  • Sensor element aged beyond calibration window low

Symptoms

  • Check engine or transmission warning light on
  • Harsh, delayed, or missing shifts
  • Possible limp mode (locked in one gear)
  • Slipping or shuddering during gear changes

Inspection / repair

  • Difficulty: shop only
  • DIY: shop recommended
  • Estimated cost: 800–4000 €
  • Estimated time: 4–12 h
  • Component: clutch actuator
  • Component: clutch assembly
  • MIL / check engine light
  • 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