Parts for your 2013 Mazda Axela-Crank angle sensor

2013 Mazda Axela crank angle sensor — what it does and how to look after it

Based on Mazda technical literature for the BL-series Mazda3/Axela (2010–2013) and SKYACTIV-G engine service documents, the 2013 Mazda Axela is fitted with a crank angle sensor, identified by Mazda as the Crankshaft Position (CKP) sensor. Workshop Manual sections covering the Engine Control System list the CKP sensor as a primary input for ignition and fuel control across MZR and SKYACTIV-G/D engines. Parts catalogues for the BL/PE engines also list a dedicated CKP sensor. So yes—this vehicle uses a crank angle sensor.

The crank angle sensor in the 2013 Mazda Axela is the ECU’s timekeeper. Sitting by the crank pulley or front cover, it reads a toothed reluctor wheel to track engine speed and the exact position of the crank. That info lets the ECU fire the spark and inject fuel right on cue, from cold starts to highway cruising. If it goes out of whack, you’ll cop hard starting, a stumble off idle, misfires, limp mode, or a flat-out no-start, often with fault codes like P0335–P0339.

There’s no routine service interval for the sensor itself, but a quick check during regular servicing pays off. Keep an eye out for oil contamination around the front cover, damaged wiring looms, or a loose connector. If the engine bay has seen a coolant or oil leak, clean the area so grime doesn’t build up around the sensor face.

Replacement is straightforward for a competent home mechanic:

• Disconnect the battery negative and let the ECU power down.
• Lift the car safely, remove the front splash shield, and locate the sensor at the front of the engine near the crank pulley.
• Unplug the connector, remove the retaining bolt, and withdraw the sensor. Inspect or replace the O-ring if fitted.
• Install the new sensor, seat it fully, and tighten the bolt to the factory specification. Reconnect the plug, refit the shield, and reconnect the battery.

After replacement, clear any stored DTCs and let the Axela idle until warm so the ECU trims settle. Most Mazda ECUs don’t need special coding for a CKP sensor, but using a quality OEM-spec sensor avoids headaches. If the engine still cranks long or stalls, check the cam sensor and timing marks—both signals work together for accurate spark and fuel timing.

Popular questions

Where is the crank angle sensor on a 2013 Mazda Axela?
The CKP sits at the front of the engine near the crankshaft pulley, reading a toothed wheel through the front cover. Access is typically from under the car with the front splash shield removed. On SKYACTIV-G models it’s low and forward, on MZR engines it’s in a similar front-cover position.

What symptoms point to a failing crank angle sensor on this model?
Common signs include long cranking, intermittent no-start, sudden stalling, rough idle, poor fuel economy, and codes like P0335. The tacho may stay dead during cranking, and the ECU can cut spark and fuel if it loses a reliable crank signal.

Does the CKP need coding or relearning after replacement?
Generally no special coding is required on the 2013 Axela. Clear fault codes, check live data for a clean RPM signal, and let the engine idle to operating temperature to settle trims. If issues persist, inspect wiring, the cam sensor signal, and mechanical timing.