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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 686 (ON-BOARD DIAGNOSTIC (ENGINE CONTROL SYSTEM L3) (1 OF 5))
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Section 686 (On-Board Diagnostic (Engine Control System L3) (1 Of 5))
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Section 686 (On-Board Diagnostic (Engine Control System L3) (1 Of 5))
WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- On-Board Diagnostic Wiring Diagram
- Monitoring System And Control System Device Relationship Chart
- Foreword
- OBD-II Pending Trouble Code
- OBD-II Freeze Frame Data
- OBD-II On-Board System Readiness Test
- OBD-II Diagnostic Monitoring Test Results
- OBD-II Read/Clear Diagnostic Test Results
- OBD-II Parameter Identification (PID) Access
- On-Board Diagnostic Test
- After Repair Procedure
- KOEO/KOER Self Test
- OBD-II Drive Mode
- Notes
- PCM Adaptive Memory Production Drive Mode
- California emission regulation applicable ATX model
- Except California emission regulation applicable ATX model
- EGR System Repair Verification Drive Mode
- HO2S heater, HO2S, and TWC Repair Verification Drive Mode
- EVAP System Repair Verification Drive Mode
- PCM Adaptive Memory Production, EGR, HO2S heater, HO2S, TWC, and EVAP System Repair Verification Drive Mode
- Diagnostic Monitoring Test Results
- DTC Table
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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.