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 MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (AJ]OBD-II DRIVE MODE [AJ]MODE 3 (HO2S HEATER, HO2S, AND TWC REPAIR VERIFICATION DRIVE MODE)
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Mode 3 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Mode 3 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)
- Perform "PCM Adaptive Memory Production Drive Mode" first.
- Verify all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
- Drive the vehicle as shown in the graph. The driving conditions before driving at constant speed are not specified.
- Stop the vehicle and access the ON BOARD SYSTEM READINESS menu of GENERIC OBD-II FUNCTION to verify the OBD monitoring status.
- If completed, the OBD monitoring status items change from non-completed to completed.
- If not completed, turn the ignition switch off, then repeat from Step 3.
- Access the DIAGNOSTIC MONITORING TEST RESULTS menu of GENERIC OBD-II FUNCTIONS to verify the monitor results.
- If the detected values are not within the specification, the repair has not been completed.
- Verify no DTCs are available.
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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.