Engine Controls Self-Diagnostics - EEC-V - CNG & Gasoline - Introduction, Self-Diagnostic System, Additional System Functions, Programming Pcm, Diagnostic Trouble Code Definitions, How To Use System Tests: Summary
If no DTC is present but driveability problem still exists, go to TROUBLE SHOOTING - NO CODES - EEC-V - CNG & GASOLINE article for symptom diagnosis or intermittent diagnostic procedures.