FixVault
Home
›
Buick
›
2003
›
Century Custom
›
Repair and Diagnosis
›
Engine Performance
›
System
›
Engine Controls Self-Diagnostics - 3.1L Engine
›
System Tests
›
Mil Always On
›
Test Description
Test Description
The number below refers to the step number on the diagnostic procedures.
2
- This step determines if the condition is with the MIL control circuit or the PCM.