P0900 OBD II Trouble Code Clutch Actuator Circuit/Open

How to quickly diagnose and repair, and causes of a P0900 code which indicates a detected open circuit situation in the clutch actuator circuit.

Symptoms of P0900 OBD II Trouble Code

  • Motor may not crank over
  • Engine may stall while driving
  • Transmission may be placed into a limp mode
  • Transmission may be stuck in one gear
  • Transmission warning lamp illuminated
  • Check engine light illuminated

Common Causes of P0900 OBD II Trouble Code

  • Defective clutch actuator
  • Defective sensor or solenoid
  • Faulty or damaged wiring
  • Loose or defective control module ground strap
  • Corroded, damaged or loose connector
  • Defective fuse or fuse-able link (If applicable)
  • Clutch master cylinder malfunction
  • Defective ECM, PCM or TCM

Severity of P0900 OBD II Trouble Code

The severity of this code is normally moderate, but P0900 can be severe if the vehicle is not shifting properly that may cause damage to internal transmission components.