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.
2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE
Fuel Pump Control Module Inspection
- Perform the KOEO self-test. (See KOEO/KOER SELF TEST .)
- Verify that a fuel pump control module related DTC is detected. (See ON-BOARD DIAGNOSTIC TEST
.)
- If DTCs are detected, repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE .)
- If a DTC is not detected, go to the next step.
- Inspect the following:
- Fuel pump control module damage
- Fuel pump control module connector damage or corrosion
- If there is any malfunction, repair or replace the malfunctioning part.
Factory Service Tools
Use the Manual With the Right Hardware
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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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