Parts for your 2017 Ford Mondeo-Crank angle sensor

2017 Ford Mondeo crank-angle sensor (crankshaft position sensor)

Technical confirmation: A crank-angle sensor (also called the crankshaft position or CKP sensor) is fitted to the 2017 Ford Mondeo across its EcoBoost petrol and TDCi diesel engines. This is documented in the Ford Workshop Manual for the 2017 Mondeo/Fusion, Section 303-14 Electronic Engine Controls (which details CKP sensor diagnostics and removal/installation), the Ford service parts catalogue for the relevant engine codes, and mainstream service data such as Autodata and Haynes. These sources also list associated fault codes (for example, P0335–P0339), confirming the part is relevant to this model.

For the 2017 Ford Mondeo, the crank-angle sensor is the engine’s timekeeper. Mounted to the block and reading a toothed wheel on the crankshaft, it tells the powertrain control module (PCM) exactly where the crank is and how fast it’s spinning. The PCM uses that live data to fire injectors, trigger spark on petrol models, manage variable valve timing, sync with the camshaft sensor, and monitor misfires. If it drops out, the Mondeo may crank but not start, cut out intermittently, or throw a check engine light.

It’s not a scheduled service item, but it does appreciate a bit of care. During routine servicing, it’s smart to:

• Inspect the sensor connector for moisture, corrosion, or loose pins, and ensure the harness isn’t chafing on brackets or under the gearbox bell housing area.
• Check for oil or coolant leaks tracking down the block, as contamination can compromise the sensor signal over time.
• Scan for stored or pending CKP-related DTCs if there are hard-starts, misfires, or hot-stall complaints.

Replacement is straightforward with basic tools, but technique matters. Use a quality OEM-equivalent sensor, disconnect the battery, and work with the engine cool. Clean the mounting face so the sensor sits square, lightly oil any O-ring, and do not shim or force it—air gap is critical. Torque the retaining bolt to workshop manual spec, route the loom exactly as from factory, then clear codes. It’s good practice to perform a crankshaft position profile relearn/adaptive reset with a compatible scan tool (Ford IDS/FDRS or equivalent). A short road test with a few warm restarts helps the PCM settle trims. Labour time typically runs 0.5–1.0 hour depending on engine and access.

Common signs of a crook crank-angle sensor on a Mondeo include long crank, rough idle, random stalling when hot, erratic tacho behaviour, higher fuel use, and DTCs like P0335–P0339 or CKP/CMP correlation faults. Because the Mondeo’s strategies rely on both crank and cam data, a failing CKP can mimic valve timing issues—so confirm power, ground, signal integrity, and the condition of the toothed wheel before calling it.

Popular questions

Where is the crank-angle sensor on a 2017 Ford Mondeo?
It’s mounted low on the engine block to read a toothed wheel on the crankshaft. On many petrol EcoBoost variants it’s near the transmission bell housing, on some diesels it can be positioned toward the front by the crank pulley. Access varies slightly by engine and whether the car is manual or auto.

Does a new crank-angle sensor need programming?
While the car may run after basic fitment, best practice is to perform a crankshaft position profile relearn/adaptive reset with a suitable scan tool and then clear codes. This helps stabilise idle quality and starting after replacement and prevents false misfire detection.

What are the common symptoms and fault codes?
Hard starting, hot stalling, rough idle, and an erratic tachometer are typical. The PCM often logs P0335–P0339 (crankshaft position circuit range/performance and related codes) and, at times, CKP/CMP correlation faults. Always inspect wiring and the connector before replacing the sensor.