P050A OBD II Trouble Code Cold Start Idle Air Control System Performance

How to easily diagnose, repair, and info on causes of a P050A trouble code that indicates a detected cold start idle air control system performance problem.

Symptoms of P050A OBD II Trouble Code

  • High or low engine RPM level
  • Engine may stall at idle
  • The accelerator pedal may have to be depressed for the engine to start
  • Unusual tapping or popping noise from IAC motor

Common Causes of P050A OBD II Trouble Code

  • Defective or dirty IAC valve
  • Vacuum leak
  • Open or shorted circuits or connectors
  • Defective electronic coolant temperature (ECT) sensor

Severity of P050A OBD II Trouble Code

A code P050A should be treated as severe because engine drivability may suffer from the conditions which cause it to be stored.