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: Introduction

NOTE: Information for Escort applies to Escort ZX2 unless otherwise indicated.

NOTE: This article covers CNG, gasoline and flex-fuel vehicles with EEC-V systems only. For Bi-Fuel (CNG and GASOLINE, or LPG and GASOLINE) vehicles with EEC-V systems, go to SELF-DIAGNOSTICS - EEC-V - BI-FUEL article.

Perform all basic diagnostic procedures in appropriate BASIC DIAGNOSTIC PROCEDURES article. If no fault is found while performing basic diagnostic procedures, proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) or only pass codes are found during self-diagnostics and symptom is present, proceed to TROUBLE SHOOTING - NO CODES - EEC-V - CNG & GASOLINE article for diagnosis by symptom.