Note On Intermittents

If Code E58 is set intermittently, problem could be caused by:

• Intermittent short to ground or voltage on circuit No. 229.
• Intermittent open on circuit No. 229.
• Intermittent loss of power or ground to PASS-KEY module. PASS-KEY module reads ignition key once each ignition cycle when ignition is first turned on. Faults in key pellet and circuits can cause a no-start condition, but they cannot cause a stall or set a Code E58.

Fig 1: PCM Code E58 Schematic - Pass-Key Fuel Enable Problem

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code E58 Flow Chart - Pass-Key Fuel Enable Problem

Courtesy of GENERAL MOTORS CORP.