Parts for your 2015 Ford Mondeo-Crank angle sensor

2015 Ford Mondeo crank-angle sensor: what it does and how to look after it

Yes, a crank-angle sensor is fitted to the 2015 Ford Mondeo. Ford technical documentation identifies it as the crankshaft position (CKP) sensor across the 1.5L and 2.0L EcoBoost petrol and 2.0L Duratorq TDCi diesel engines used in the CD391 Mondeo/MD/MK5 generation. Ford’s Workshop Manual for the 2015 Mondeo (Engine Management sections, commonly 303-series) and the factory wiring diagrams show a dedicated CKP signal into the PCM. Modern OBD‑II misfire monitoring strategies also rely on crank speed variation measured by the CKP, reinforcing that this sensor is fundamental to engine control.

On this Mondeo, the crank-angle (CKP) sensor reads a toothed wheel on the crankshaft to tell the ECU exactly where the pistons are and how fast they’re spinning. That timing info is used to fire injectors and spark (on petrols), control fuel on diesels, manage idle, and detect misfires. If the signal goes missing or messy, the car can be hard to start, stumble, or drop into limp mode.

It’s a solid-state sensor and not a scheduled service item, but it benefits from a quick check during routine servicing. Keep an eye out for oil contamination around the sensor mounting point, chafed wiring near the bellhousing or crank pulley area, and loose connectors. On many Mondeos it’s mounted near the gearbox bellhousing reading the flywheel/reluctor, access is typically from under the car or via the wheel arch. A clean, intact harness and a dry, snug sensor help prevent intermittent faults.

• Common symptoms of a failing CKP: long crank/no start, random stalling, rough idle, poor fuel economy, and a check engine light with codes like P0335–P0339.
• Service tips: keep the connector clean and latched, route the loom away from hot exhaust and moving parts, and inspect for metal debris on the sensor tip if it’s magnetic.

Replacement is straightforward for a trained tech and usually doesn’t require major disassembly. Best practice is to disconnect the battery, let the engine cool, confirm the fault with scan data, and check the reluctor teeth for damage. Fit an OEM-quality sensor, ensure proper seating and air gap per service info, clear any codes, and perform a crankshaft position relearn with a scan tool if the procedure is available. If faults persist, verify power/ground and signal integrity back to the PCM rather than throwing more parts at it.

• Where is the crank-angle sensor on a 2015 Mondeo?
  On most 1.5L/2.0L EcoBoost petrols and the 2.0L TDCi, it’s mounted at the rear of the engine near the transmission bellhousing, aimed at the flywheel/reluctor. Some variants position it low on the block near the crank pulley. Access is usually from below or via the right-front wheel arch with the liner removed.
• Does it need regular servicing or a relearn?
  There’s no scheduled replacement. Just inspect wiring and cleanliness during routine servicing. After replacing the sensor, a crank relearn with a capable scan tool is recommended so the ECU can calibrate misfire and timing strategies.
• Is it safe to drive with a dodgy crank-angle sensor?
  Not really. A failing CKP can cause sudden stalling or a no-start after a short stop. It’s best to diagnose and repair promptly to avoid getting stranded and to protect the engine and catalytic converter.