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 CARSECTION 559 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0074CIRCUIT/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 car, the 2006 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
- The PPS pressure sensor
- The PPS module
- The PPS pressure sensor wiring harness connector
- The PPS module wiring harness connector
- Ignition OFF, inspect the component and harness sides of the connector for the PPS pressure sensor. Verify there is no damage or corrosion is found.
- Disconnect the PPS module connector.
- Test the PPS sensor signal circuit for a short to ground, a high resistance or an open. Verify that a short to ground, a high resistance or an open does not exist.
- If any of the above conditions are found, make the appropriate repair.
- Test the PPS sensor low reference circuit for a short to ground, a short to voltage, a high resistance or an open. Verify that a short to ground, a short to voltage, a high resistance or an open does not exist.
- If any of the above conditions are found, make the appropriate repair.
- Test the PPS sensor 5-volt reference circuit for a short to ground, a short to voltage, a high resistance or an open. Verify that a short to ground, a short to voltage, a high resistance or an open does not exist.
- If any of the above conditions are found, make the appropriate repair.
- Ignition ON, engine OFF test the PPS sensor signal circuit with a DMM. Measure the voltage of the PPS sensor circuit harness side and ground. The voltage should read 0.05-4.5 volts.
- If the voltage is more than 5 volts, test the PPS sensor signal circuit for a short to voltage. If the circuit tests good, replace the PPS.
- Reconnect all PPS components. Use the scan tool to clear all PPS DTCs. Rezero the PPS. Refer to Passenger Presence System Rezeroing . Verify DTC B0074 does not exist.
- If DTC B0074 reset, replace the PPS.
IMPORTANT:
When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
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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.