Section 21 (Engine Controls - Tests W/Codes - 5.4L): Introduction

WARNING: This page is about a different car, the 1998 Lincoln Navigator and 1998 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Vehicles use EEC-V (104-pin PCM) system.

Perform all BASIC DIAGNOSTIC PROCEDURES in appropriate article:

For Expedition, see BASIC TESTING - 5.4L.
For Navigator, see BASIC TESTING .

If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no diagnostic trouble codes or only pass codes are found during self-diagnostics, proceed to TESTS W/O CODES article for diagnosis by symptom.