Parts for your 2019 Mazda Cx-5-Crank angle sensor

2019 Mazda CX-5 crank-angle sensor: what it does, and when to replace it

Technical sources confirm that the 2019 Mazda CX-5 is fitted with a crank-angle sensor (Mazda refers to it as the Crankshaft Position or CKP sensor). The Mazda Workshop Manual for CX-5 (KF, 2017–2021) lists the CKP sensor as an engine control input for SKYACTIV-G 2.0/2.5/2.5T and SKYACTIV-D 2.2 engines, and the Mazda Electronic Parts Catalogue shows a dedicated “Sensor, Crankshaft” for these engines. Industry data services used in workshops also identify the CKP sensor as a primary input the PCM relies on for ignition and injection timing.

On the CX-5, the crank-angle sensor reads a toothed wheel on the crankshaft to report exact crank angle and engine speed to the PCM. That data is the backbone for spark timing, fuel delivery, variable valve timing control, and misfire detection. If the signal drops out, the engine may not start at all, if it degrades, running can be rough, with the MIL on and stored fault codes such as P0335/P0336.

This sensor isn’t a routine service item. During regular servicing, the sensible approach is visual: check the harness routing, connector lock, and nearby oil leaks or heat damage around the sensor’s mounting on the block. Keeping the area clean and avoiding blasting the connector when washing under the bonnet goes a long way.

Replacement is straightforward for a trained tech and typically takes under an hour. It’s a remove-and-refit job: disconnect the battery, unplug the connector, undo the retaining bolt, swap the sensor, and torque the bolt to Mazda’s spec. Harness clips should be refitted exactly as found to avoid chafing. On these engines, the PCM generally syncs automatically—no special programming is usually required after replacement, though a short drive cycle helps it settle. Clearing codes and confirming a clean crank signal on a scan tool is standard practice.

Common signs that point to a failing crank-angle sensor include:

• Cranks but won’t start, or intermittent no-start when hot
• Stalls at idle, erratic tachometer, or sudden loss of power
• MIL on with CKP-related fault codes

When a new sensor is needed, OE or OE-quality parts are the safe bet. A quick check of the trigger wheel condition and any oil leaks near the sensor is wise at the same time. Left unresolved, a weak CKP signal can cause repeated no-start events and leave the CX-5 stranded, so timely diagnosis and replacement are well worth it.

Technical sources referenced: Mazda Workshop Manual (CX-5 KF, 2017–2021): Engine Control System > Crankshaft Position (CKP) Sensor—component location, inspection and signal description, Mazda Electronic Parts Catalogue (CX-5 KF): Sensor, Crankshaft listings for SKYACTIV engines, Independent workshop data providers listing CKP sensor as a primary PCM input on 2019 CX-5.

Popular questions about 2019 Mazda CX-5 crank-angle sensors

Does a 2019 Mazda CX-5 actually have a crank-angle sensor?
Yes. All 2019 CX-5 engines (SKYACTIV-G petrol and SKYACTIV-D diesel) use a crankshaft position sensor, commonly called a crank-angle sensor. It’s a critical PCM input for spark, fuel and timing control.

What are the usual symptoms when the crank-angle sensor starts failing on a CX-5?
Typical signs include a crank-no-start, intermittent stalling (often when hot), rough running, erratic tach readings and the MIL illuminated with codes like P0335 or P0336. Because the sensor is essential for timing, failures can stop the engine from firing altogether.

Is the crank-angle sensor a service item, and does it need programming after replacement?
It isn’t a routine service item and is only replaced if faulty. After fitting a quality replacement and reconnecting correctly, the PCM generally relearns the signal automatically—no special programming is usually required. A short road test and scan tool check to confirm a stable CKP signal is good practice.