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HOMESERVICE MANUALSPONTIAC2006G6 GTP, 2D COUPE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 13 (ENGINE CONTROL SYSTEM - 3.5L - DTC P0016 TO DTC P0140)DTC P0112, P0113, P1111, OR P1112CIRCUIT/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.

P0112 or P1112

  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the MAF/IAT sensor. Observe the IAT sensor with a scan tool for -36°C (-33°F).
    • If more than -36°C (-33°F), then test the signal circuit of the IAT sensor for a short to ground or a short to the IAT low reference circuit and repair as necessary. If all circuits test normal, replace the control module.
    • If less than -36°C (-33°F), replace the MAF/IAT sensor.
    • If the IAT signal circuit tests normal, the replace the control module.
IMPORTANT: The sensor may be damaged if the circuit is shorted to a voltage source.

P0113 or P1111

  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the IAT sensor.
  3. Measure for 4.9-5.2 volts, between the IAT sensor signal circuit and a good ground with a DMM.
    • If voltage is less than 4.9 volts, test the IAT sensor signal circuit for high resistance or an open circuit.
    • If voltage is more than 5.2 volts, test the IAT sensor signal circuit for a short to voltage, or any 5-volt reference.
    • If the IAT sensor signal circuit tests normal, and the voltage is still not within the proper range, then replace the control module.
  4. Turn OFF the ignition, and all electrical accessories. Allow sufficient time for all of the control modules to power down before taking a resistance measurement.
  5. Measure for less than 5 ohms of resistance between the IAT low reference and a good ground.
    • If the resistance is more than 5 ohms, test the low reference circuit for a high resistance or an open circuit. If the circuit tests normal, replace the control module.
    • If all circuits test OK, then replace the IAT sensor.
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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.