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.
2012 Mazda 6 V6-3.7LFACTORY OEM SERVICE PROCEDURE
Crankshaft Position Sensor: Testing and Inspection
CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [MZI 3.7 V6]
Visual Inspection
1. Disconnect the negative battery cable. Removal and Replacement
2. Remove the catalytic converter (WU-TWC) (LH) for easier access. Service and Repair
3. Remove the CKP sensor. Service and Repair
4. Verify that there are no metal shavings on the CKP sensor.
- If there is a malfunction, remove any metal shavings that are adhering.
Resistance Inspection
1. Disconnect the negative battery cable. Removal and Replacement
2. Remove the catalytic converter (WU-TWC) (LH) for easier access. Service and Repair
3. Remove the CKP sensor connector. Service and Repair
4. Measure the resistance between CKP sensor terminals A and B.
- If not within the specification, replace the CKP sensor. Service and Repair
CKP sensor resistance
- 575-790 ohms [18-28 °C {65-82 °F}]
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.