Parts for your 2015 Ford Focus-Crank angle sensor

2015 Ford Focus crank angle sensor (crankshaft position sensor)

Technical sources confirm the 2015 Ford Focus is fitted with a crank angle sensor, commonly called the crankshaft position (CKP) sensor. Ford’s Workshop Manual for the 2015 Focus and Motorcraft wiring diagrams list the CKP as a primary engine control input across petrol and diesel variants, working alongside the camshaft position (CMP) sensor. Diagnostic coverage for DTCs P0335–P0339 in Ford service literature also backs its presence and critical role.

The CKP sensor tracks the exact position and speed of the crankshaft, so the PCM can time fuel injection and spark with pinpoint accuracy. It also feeds crank speed fluctuation data used for misfire detection. Whether it’s the 1.0‑litre EcoBoost, the 2.0‑litre GDI/EcoBoost, or market‑specific diesel, the Focus relies on a toothed reluctor wheel and a magnetic/Hall‑effect CKP to keep things running sweet.

As a service item, the crank angle sensor itself isn’t routine‑replace or adjustable, but it deserves attention during regular servicing. A few practical checks help avoid headaches:

• Inspect the sensor connector and harness for oil contamination, brittle conduit, or chafing near the block and bellhousing.
• Keep the mounting face clean and free of sealant, incorrect fitment can alter the air gap on some designs.
• If the engine has had timing work, confirm the reluctor wheel isn’t damaged or misaligned.

Typical warning signs of CKP trouble include hard starting or no‑start when hot, random stalling, a dead tachometer during crank, poor fuel economy, and stored codes like P0335. The engine may crank strongly but refuse to fire because the PCM can’t “see” crank position.

Replacement is straightforward for a trained tech: disconnect the battery, unplug the sensor, remove the retaining fastener, and swap the unit, taking care with the O‑ring and routing the loom away from heat and moving parts. Use quality OEM‑spec parts. On many Focus engines the gap is fixed by design, so no shimming is needed. After replacement, a short drive cycle usually lets the PCM relearn its misfire profile—idling to warm, then steady cruise around 60–80 km/h does the trick. If faults persist, follow Ford WSM pin‑out tests and scope the CKP signal to rule out wiring.

Bottom line: per Ford’s workshop documentation and mainstream data providers (e.g., Autodata/Haynes), the 2015 Focus absolutely uses a crank angle sensor, and keeping its wiring clean and intact goes a long way to a drama‑free drive.

Popular questions

Where is the crank angle sensor on a 2015 Ford Focus?
Location varies by engine. On many 2.0‑litre petrol models it’s mounted low on the block near the transmission bellhousing reading the flywheel/reluctor. Some 1.0‑litre EcoBoost versions place it at the front of the engine near the crank pulley. A quick check in the Ford Workshop Manual or a visual trace of the loom will confirm the exact spot.

Can you drive with a faulty crank angle sensor?
Not a great idea. A failing CKP can cause intermittent stalling, no‑start, or severely reduced power. If it drops out while driving, the engine can cut suddenly. Get it diagnosed and repaired before it strands you.

Does the crank angle sensor need regular servicing?
It’s maintenance‑free, but it benefits from periodic inspection. During routine services, check for oil leaks onto the connector, secure harness routing, and intact shielding. Replace the sensor only if it’s faulty or contaminated, and clear codes after repair.