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 MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 387 (ENGINE CONTROL SYSTEM - SELF-DIAGNOSTICS - 4.2L)DRIVE CYCLESINSPECTION/MAINTENANCE HEATED OXYGEN SENSOR/OXYGEN SENSOR SYSTEM SET PROCEDURETEST DESCRIPTION
2004 Oldsmobile Bravada RWD
Test Description
2004 Oldsmobile Bravada RWDSECTION Test Description
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refers to the step numbers in the procedures.
- 1 - Make sure that you perform the I/M System Check before performing this test. Failure to do so may result in difficulty updating the status to YES.
- 2 - The oxygen sensor tests begin shortly after the indicated speed is achieved. The engine RPM may be too low in overdrive on manual transmission vehicles. If difficulty is encountered updating the status, operate the vehicle in the recommended gear during the test.
- 3 - This step identifies a first failure of a type "B" DTC. A DTC only appears on the I/M System Status display when the DTC becomes a MIL illuminating DTC. This occurs on the second failure of a type "B" DTC. A first failure of a type "B" DTC will not allow the I/M System Status to update to YES. See DIAGNOSTIC AIDS .
- 4 - This step helps identify any unique or unusual criteria required to run the diagnostic test if the universal set procedure does not. This information is located in CONDITIONS FOR RUNNING DTC.
- 5 - The I/M System Status only reports on whether or not a diagnostic has run, not the outcome of the test. If any emission related DTC sets after the tests are complete, the DTC will require diagnosis.
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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.