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
Camshaft Position Sensor: Testing and Inspection
CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZI 3.7 V6]
Visual Inspection
1. Disconnect the negative battery cable. Removal and Replacement
2. Remove the resonance chamber and air cleaner assy for easier access. Service and Repair
3. Disconnect the CMP sensor connector
4. Remove the CMP sensor. Service and Repair
5. Verify that there are no metal shavings on the CMP 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 CMP sensor connector.
3. Measure the resistance between CMP sensor terminals A and B.
- If not within the specification, replace the CMP sensor. Service and Repair
CMP sensor resistance
- 800-1,320 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.