Note On Intermittents

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

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

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

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

Courtesy of GENERAL MOTORS CORP