Engine Controls - Trouble Shooting - No Codes: INTERMITTENTS: Preliminary

Perform the Diagnostic System Check-Engine Controls before starting. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - 4.0L AURORA article. The fault must be present to locate a problem using the DTC table. If a fault is intermittent, the use of DTC procedures may result in the replacement of good parts.