Parts for your 2019 Ford Fiesta-Crank angle sensor

2019 Ford Fiesta crank‑angle sensor (crankshaft position sensor)

Drawing on Ford workshop literature for the 2018–2019 Fiesta (Section 303‑14), Motorcraft parts catalogues, and standard OBD diagnostics, the 2019 Ford Fiesta is definitely fitted with a crank‑angle sensor, usually termed the crankshaft position (CKP) sensor. Every local 1.0‑litre EcoBoost and the ST’s 1.5‑litre EcoBoost use it for engine management.

It reads a toothed reluctor on the crankshaft to tell the PCM exactly where the pistons sit, in degrees of rotation. That timing data lets the Fiesta fire spark and inject fuel at the right moment, synchronise with the cam sensor for variable valve timing, log misfires, and manage idle and starting.

While the CKP is not a scheduled service item, it’s critical. Typical failure signs are a crank‑no‑start, intermittent stalling when hot, rough running, poor economy, and a check‑engine light with codes such as P0335–P0339. Heat, oil contamination, wiring chafe near the bellhousing, or a damaged reluctor ring are common culprits.

Before replacing, confirm live RPM on a scan tool, inspect the connector for corrosion, and check loom routing under the bonnet. If replacement is needed, disconnect the battery, remove the retaining bolt, gently twist the sensor free, wipe the mounting bore, and install a quality Motorcraft or OEM‑equivalent part to the specified torque.

On most 1.0 EcoBoost cars it sits low on the block near the gearbox, the ST is similar. Expect roughly 0.5–1.0 hours with basic spanners. After refitting, clear codes, perform a crank profile relearn if the scan tool offers it, and road‑test while watching RPM and misfire counters.

There’s no kilometre‑based replacement interval, but good habits help: keep oil leaks at bay, avoid blasting the connector with a pressure washer, and secure the harness away from sharp edges. If drivability goes pear‑shaped and the Fiesta won’t start or keeps cutting out, don’t keep cranking, get it scanned promptly.

Technicians also check sensor air‑gap and the O‑ring. A nicked O‑ring can wick moisture in and trigger stalls after rain. Stick with genuine‑spec parts, as cheap magnets skew timing at high RPM. Finishing with a KAM reset helps the PCM relearn idle and starting trims quickly again.

Q: Where is the crank‑angle sensor on a 2019 Ford Fiesta?

A: On most 1.0‑litre EcoBoost engines it’s low on the back of the block by the transmission bellhousing, accessed from under the car or the left wheel arch. The 1.5‑litre ST mounts similarly. Look for a two‑pin or three‑pin connector and a single retaining bolt into the block.

Q: Can they keep driving with a failing crank‑angle sensor?

A: It might run, then suddenly stall or refuse to restart, which isn’t safe in traffic. Because the CKP feeds core timing, a failing sensor can leave the Fiesta dead‑flat without warning. It’s best to avoid driving and arrange a scan and repair, or tow it to a workshop.

Q: Does a new crank‑angle sensor need programming on a 2019 Fiesta?

A: No coding is usually required. After installing a correct‑spec sensor, clear fault codes and, if available on the scan tool, perform a crank profile relearn and a KAM reset. That helps the PCM settle idle and starting behaviour faster after the repair.