Note On Intermittents

WARNING: This page is about a different car, the 1995 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.

This code may set due to an intermittently sticking ISC motor.

Fig 1: Code P030 Schematic, ISC RPM Out Of Range

Courtesy of GENERAL MOTORS CORP

Fig 2: Code P030 Diagnostic Flow Chart - 1 Of 2, ISC RPM Out Of Range

Courtesy of GENERAL MOTORS CORP

Fig 3: Code P030 Diagnostic Flow Chart - 2 Of 2, ISC RPM Out Of Range

Courtesy of GENERAL MOTORS CORP