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.
2003 Infiniti QX4 4WDFACTORY OEM SERVICE PROCEDURE
Mode 4: Clearing Codes
This mode can clear all emission related diagnostic information for DTCs. These include:
- Clear number of DTCs (MODE 1).
- Clear DTCs (MODE 3).
- Clear DTC for freeze-frame data (MODE 1).
- Clear freeze-frame data (MODE 2).
- Reset status of system monitoring test (MODE 1).
- Clear on-board monitoring results (MODE 6 and 7).
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.