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.
1998 Mazda 626 DX, StandardFACTORY OEM SERVICE PROCEDURE
OBD-II Drive Cycle
- Perform VEHICLE PREPARATION. Drive vehicle in stop and go traffic with a minimum of 4 idle periods (30 seconds each) while observing OBD-II monitor status on scan tool. If Exhaust Gas Recirculation (EGR), HEATED OXYGEN SENSOR (HO2S), Secondary Air (AIR) or catalyst efficiency monitor is not completed, drive vehicle at a constant speed more than 40 MPH, but less than 65 MPH for up to 15 minutes.
- DO NOT open throttle wide open, use heavy accelerations or use sudden accelerations. If scan tool sounds a 3 beep pulse at any time, OBD-II drive cycle is complete. If EGR, HO2S, AIR or catalyst efficiency monitor is not completed, perform appropriate monitor verification drive cycle. Shut engine off. Retrieve Continuous Memory DTCs to verify DTC P1000 has been cleared.
Factory Service Tools
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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.
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