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 MANUALSBUICK2006RAINIER 4.2 S, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - 4.2L - DTC P0013 TO P0134DTC P0106CIRCUIT/SYSTEM TESTING
2006 Buick Rainier 4.2 S, AWD
Circuit/System Testing
2006 Buick Rainier 4.2 S, AWDSECTION Circuit/System Testing
- Turn ON the ignition, with the engine OFF.
- Disconnect the MAP sensor.
- Connect a test lamp between the MAP sensor 5-volt reference circuit and a good ground.
- Measure for a proper range of 4.8-5.2 volts between the MAP sensor 5-volt reference circuit and a good ground.
- If the voltage is less than the specified range, then test the circuit for a high resistance or a faulty PCM.
- If the voltage is more than the specified range, then test the circuit for a short to voltage or a faulty PCM.
- With the MAP sensor still disconnected, use the scan tool to observe the MAP Sensor parameter for the proper value of less than 12 kPa.
- If the MAP Sensor parameter is more than 12 kPa, then test the MAP sensor signal circuit for a short to voltage or a faulty PCM.
- Connect a jumper wire between the MAP sensor 5-volt reference circuit and the MAP sensor signal circuit.
- Use the scan tool to observe the MAP Sensor parameter for the proper value of more than 103 kPa.
- If the MAP Sensor parameter is less than 103 kPa, then test the MAP sensor signal circuit for a high resistance or a faulty PCM.
- Turn OFF the ignition, and all electrical accessories. Allow sufficient time for the control modules to power down before taking a resistance measurement.
- Measure for a proper value of less than 5 ohms of resistance between the low reference circuit of the MAP sensor and a good ground.
- If the resistance is more than 5 ohms, then test the circuit for a high resistance or a faulty PCM.
- If the MAP sensor circuits test normal, then replace the MAP 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.