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 MANUALSCHEVROLET2002VENTURE LT, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS SELF-DIAGNOSTICSDIAGNOSTIC TESTSDTC P1134: HO2S TRANSITION TIME RATIO - SENSOR 1TEST DESCRIPTION
2002 Chevrolet Venture LT, AWD
Test Description
2002 Chevrolet Venture LT, AWDSECTION Test Description
The numbers below refer to the step numbers in the diagnostic procedures.
- 2
The HO2S 1 voltage may default to the bias voltage. The DTC should be cleared and the Freeze Frame/Failure Records data recorded before proceeding. A normally functioning HO2S 1 voltage signal will fluctuate above and below the bias voltage amount. - 4
A voltage reading other than the specified amount in this step indicates an open circuit condition in the high signal circuit or the PCM. - 6
This step checks the HO2S 1 signal circuits from the HO2S connector and the PCM connectors, including the low reference loop between the PCM connectors. - 8
This step checks for correct HO2S 1 heater circuit operation up to the HO2S connector. The heater low control is controlled by the PCM. The engine must be running to enable the HO2S heater. - 9
The conditions listed may contribute to the failure of the HO2S. The conditions listed apply only to this type of failure.
RENDER: 1.0x
NO RELATED
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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.