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 88 (ENGINE CONTROLS SELF-DIAGNOSTICS - 2.2L)INSPECTION/MAINTENANCE PROCEDURESINSPECTION/MAINTENANCE HEATED OXYGEN SENSOR/OXYGEN SENSOR (HO2S/O2S) SYSTEM SET PROCEDUREDIAGNOSTIC PROCEDURES
2004 Oldsmobile Bravada RWD
Diagnostic Procedures
2004 Oldsmobile Bravada RWDSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- Did you perform the Inspection/Maintenance (I/M) System Check? If yes, go to next step. If no, go to INSPECTION/MAINTENANCE SYSTEM CHECK .WARNING: Road test vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
- Ensure vehicle is within the conditions for running DTC. Turn off all accessories (e.g., A/C, blower fan, etc.). Start engine and allow to idle.
- Accelerate vehicle at part throttle to 45-55 MPH and maintain speed for 6 minutes or until I/M System Status updates to YES.
- Vehicles equipped with 5 or 6-speed manual transmission, may require operation in 4th or 5th gear respectively, in order for this test to run.
Using scan tool, review I/M System Status display. Did HO2S/O2S system status updates to YES? If yes, go to step 5. If no, go to next step.
- Using a scan tool, observe the DTC Information. Does scan tool indicate any failed DTCs? If yes, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.NOTE: Refer to INSPECTION/MAINTENANCE SYSTEM DTCS to determine which DTCs are required to run in order to complete this test.
- Using scan tool, observe the NOT RAN SINCE CODE CLEARED display. Determine which of the DTCs required for a YES status has not run. Enter DTC number in the Specific DTC menu of scan tool. Operate vehicle within the conditions for running the DTC. See CONDITIONS FOR RUNNING DTC . Repeat the procedure until scan tool indicates the diagnostic test has run. Repeat this step for any additional required DTCs that have not run. Using scan tool, observe the I/M System Status display. Did the HO2S/O2S system status updates to YES? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
- Using scan tool, observe the emission related DTC portion of the I/M System Status display. Does scan tool indicates any emission related DTCs set? If yes, diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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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.