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.
Camshaft Position (CMP) Sensor
The CMP sensor detects camshaft angle at 180-degree intervals (4-cylinder) or 120-degree intervals (6-cylinder) and sends a signal to the PCM. The CMP sensor also detects cylinder No. 1 TDC (4-cylinder) or No. 1 and No. 4 TDC (6-cylinder) and sends a signal to the PCM. The CMP signal is used for fuel synchronization. For CMP sensor location, see CAMSHAFT POSITION SENSOR LOCATIONS table. On MPV, the CMP sensor pulses once per camshaft revolution. On Mazda6 3.0L, 2 CMP sensors are used.
| Application | Location | |
|---|---|---|
| B2300 | Top Rear Of Valve cover | |
| B3000 | Top Rear Of Engine | |
| B4000 | Front Of Engine, On Left Valve Cover | |
| Mazda6 | ||
| 2.3L | Top Left Rear Of Valve Cover | |
| 3.0L | Front Of Left And Right Cylinder Heads | |
| Miata | Right Rear Of Cylinder Head | |
| MPV | Front Of Left Cylinder Head | |
| Protege & Protege5 | Front Of Cylinder Head | |
| Tribute | ||
| 2.0L | Right Rear Of Engine | |
| 3.0L | Front Of Left Cylinder Head | |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.