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 P0116CIRCUIT/SYSTEM TESTING
2006 Buick Rainier 4.2 S, AWD
Circuit/System Testing
2006 Buick Rainier 4.2 S, AWDSECTION Circuit/System Testing
- Disconnect the ECT sensor.
- Turn ON the ignition, with the engine OFF.
- Measure for the proper range of 4.9-5.2 volts between the ECT sensor signal circuit and a good ground with a DMM.
- If the voltage is less than 4.9 volts, test the ECT sensor signal circuit for a high resistance short to ground.
- If the ECT sensor signal circuit tests normal, and the voltage is still not within the proper range, then replace the PCM.
- Remove and test the ECT sensor. Refer to Component Testing.
- If the resistance measurements of the ECT sensor are out of range, replace the sensor.
- If the ECT sensor tests normal and the DTC continues to set, then replace the PCM.
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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.