Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC2006GRAND PRIX GTREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - 3.8L - DTC P0016 TO P0171DTC P0033CIRCUIT/SYSTEM TESTING
2006 Pontiac Grand Prix GT
Circuit/System Testing
2006 Pontiac Grand Prix GTSECTION Circuit/System Testing
- Turn OFF the ignition.
- Disconnect the Supercharger Boost Solenoid control solenoid.
- Turn ON the ignition, with the engine OFF.
- Probe the battery positive voltage circuit of the Supercharger Boost Solenoid with a test lamp that is connected to a good ground.
- If the test lamp does not illuminate, test the circuit for an open or for a short to ground.
- Connect a test lamp between the control circuit of the Supercharger Boost Solenoid and the battery positive voltage circuit of the Supercharger Boost Solenoid control at the Supercharger Boost Solenoid harness connector.
- If the test lamp illuminates, test the control circuit of the Supercharger Boost Solenoid for a short to ground.
- Command the Supercharger Boost Solenoid ON and OFF.
- If the test lamp does not illuminate with the commanded state of the solenoid, test the control circuit of the Supercharger Boost Solenoid for a short to voltage or an open.
- If the circuits and the control module test normal, replace the Supercharger Boost Solenoid.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.