Note On Intermittents

If Code P058 is intermittent, check for short to ground or voltage on circuit No. 229, intermittent open in circuit No. 229, or intermittent loss of power or ground to PASS-Key(R) decoder module. PASS-Key(R) decoder module reads ignition key once each ignition cycle when ignition is first turned on, therefore, faults in key pellet and circuits to ignition lock cylinder can cause a no start condition but cannot cause a stall or Code P058.

Fig 1: Code P058 Schematic, Pass-Key(R) Fuel Enable Problem

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P058 Diagnostic Flow Chart, Pass-Key(R) Fuel Enable Problem

Courtesy of GENERAL MOTORS CORP.