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 12 (ENGINE CONTROL SYSTEM - 2.4L - DTC P0010 TO DTC P0341)DTC P0068 OR P0121CIRCUIT/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 for the following conditions:
- Vacuum hoses for splits, kinks and proper connections as shown on Vehicle Emission Control Information label
- Inspect thoroughly for any type of leak or restriction
- Air leaks at throttle body mounting area and intake manifold sealing surfaces
- Allow the engine to reach operating temperature. Observe the Manifold Absolute Pressure (MAP) Sensor Voltage parameter with a scan tool. Voltage should be more than 0.8 volt and less than 4 volts.
- If more than 4 volts or less than 0.8 volt, refer to DTC P0106 .
- Idle the engine. Observe the MAP Sensor kPa parameter with a scan tool. Increase the engine speed slowly and then back to idle. The MAP sensor kPa should change smoothly and gradually as engine speed is increased and returned to idle.
- If the MAP sensor kPa does not change refer to DTC P0106 .
- Take a snapshot of the engine data list while performing the actions listed below. The MAF sensor kPa should change smoothly and gradually as the engine speed is increased and is returned to idle.
- Idle the engine.
- Increase the engine speed slowly to 3,000 RPM, then back to idle.
- Exit from the snapshot and review the data.
- Observe the Mass Air Flow (MAF) Sensor parameter frame by frame with a scan tool. The MAF sensor kPa should change smoothly and gradually as the engine speed is increased and is returned to idle.
- If the MAF sensor kPa does not change smoothly and gradually as the engine speed is increased and is returned to idle refer to DTC P0101 or P1101 .
- Inspect the throttle body for the following conditions:
- Loose or damaged throttle blade
- Broken throttle shaft
- Any throttle body damage
- If any of these conditions exist, replace the throttle body assembly.
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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.