Engine Controls - Tests W/Codes - 2.5L: Introduction

If no faults were found while performing appropriate BASIC TESTING - GASOLINE , proceed with self-diagnostics. If no fault codes or only pass codes are present after entering self-diagnostics, proceed to TEST NF-1A and TESTS W/O CODES - GASOLINE article in the ENGINE PERFORMANCE Section for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).