Engine Controls - Tests W/Codes - 6.0L V12: Introduction

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no Diagnostic Trouble Codes (DTCs) or only pass codes are present after entering self-diagnostics, proceed to TESTS W/O CODES - 6.0L V12 article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).