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.
2024 Mazda 3 Preferred, 4D HatchbackFACTORY OEM SERVICE PROCEDURE
Brake override system operation inspection
NOTE:
- If the brake override system operates normally after performing the following inspection, the PCM detects DTC P2299:00.
- Start the engine and let it idle.
- Verify that the engine speed becomes less than 1, 200 rpm under the following conditions.
- Neutral (MTX)
- N position (ATX)
- Engine speed of 3, 000 rpm or more with accelerator pedal depressed
- Brake pedal depressed
- If the engine speed becomes approx. 1, 200 rpm, clear the PCM DTC using the M-MDS. (System operation is normal.)
- If the engine speed does not become approx. 1, 200 rpm, inspect for the following parts, then repair or replace the malfunctioning part:
- APP sensor (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] .)
- Neutral sensor (MTX) (See NEUTRAL SENSOR INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] .)
- Brake switch (See BRAKE SWITCH INSPECTION .)
- Communication between PCM and TCM (ATX) (Refer to [MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] ] in service information.)
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.