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 MANUALSPONTIAC2006G6 GTP, 2D COUPE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 16 (ENGINE CONTROL SYSTEM - 2.4L - DTC P0351 TO DTC P2138)DTC P1516, P2101, P2119 OR P2176CIRCUIT/SYSTEM TESTING
2006 Pontiac G6 GTP, 2D Coupe, Standard
Circuit/System Testing
2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Inspect the throttle body for the following conditions:
- A throttle blade that is NOT in the rest position
- A throttle valve that is binding open or closed
- A throttle valve that is free to move open or closed WITHOUT spring pressure
- Ignition ON and the throttle body disconnected, measure for voltage on the motor control 1 and 2 circuits. Voltage should be 0 volts.
- If voltage is more than 0 volts, test the affected motor control circuit for a short to voltage or a faulty ECM.
- Ignition ON and the throttle body disconnected, probe the motor control 1 and 2 circuits with a test lamp connected to B+. Test lamp should not illuminate
- If test lamp illuminates, test the affected motor control circuit for a short to ground.
- With the ignition ON and the throttle body connected, clear DTCs.
- With the ignition OFF, disconnect the throttle body and connect a DMM between the motor control 1 circuit and ground.
- Using the peak min max function measure the voltage on the motor control 1 circuit as the ignition is turned ON. Voltage should be within 1 volt of ignition voltage.
- If voltage is not within 1 volt of ignition voltage, test for a faulty ECM.
- With the ignition ON and the throttle body connected, clear DTCs.
- With the ignition OFF, disconnect the throttle body and connect a DMM between the motor control 2 circuit and ground.
- Using the peak min max function measure the voltage on the motor control 2 circuit as the ignition is turned on. Voltage should be within 1 volt of ignition voltage.
- If voltage is not within 1 volt of ignition voltage, test for a faulty ECM.
- If all circuits test normal, replace the throttle body.
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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.