Parts for your 2020 Ford Fiesta-Crank angle sensor

2020 Ford Fiesta crank-angle sensor (CKP) — what it does and how to look after it

Based on technical sources — including the Ford Workshop Manual for Fiesta (2017–2020), Motorcraft service wiring diagrams, and mainstream service data providers used in Australia and New Zealand — the 2020 Ford Fiesta is fitted with a crankshaft position sensor. In workshop language it’s the CKP, many techs also call it a crank-angle sensor. So yes, it’s relevant and used on this model.

The crank-angle sensor sits at the heart of the Fiesta’s engine management. It monitors the crankshaft’s exact position and speed via a toothed wheel, feeding that signal to the ECU so it can fire the spark, time the fuel injection, and sync with the cam sensor. On the EcoBoost engines, accurate crank data also helps with start-up, idle stability, knock control and misfire monitoring. If the signal drops out, the Fiesta may be hard to start, stall, or not start at all — the ECU simply won’t guess where the crank is.

It isn’t a scheduled replacement item, but it’s smart to give it a once-over during servicing. Under the bonnet, check the CKP harness where it runs to the sensor: look for rubbed insulation, loose clips, oil contamination around the connector, or a weeping crank seal that could soak the sensor. A scan with a decent diagnostic tool can confirm a clean RPM signal and reveal fault codes like P0335–P0339 if trouble’s brewing.

• Common clues it’s unhappy: intermittent no-start, sudden stall when hot, long crank time, tach needle dropping to zero, MIL on, rough running under load.
• Quick checks: live data RPM while cranking, wiggle-test the harness, inspect for metal debris clinging to the sensor tip, verify good battery voltage.

When replacement is needed, go for a quality OE-spec sensor. Disconnect the battery, let the engine cool, then access the CKP where it’s mounted to the block reading the reluctor wheel. Remove the retaining bolt, note the O-ring, and keep the area clean so no grit gets between sensor and mounting face. Lightly oil the new O-ring, seat the sensor square, and tighten the bolt to the specification in the workshop manual. Reconnect the battery, clear DTCs, and perform an idle relearn/short drive cycle. If space is tight, working from underneath on stands makes life easier. Avoid dropping the sensor or letting metal filings stick to the tip — alignment and a clean signal path are key for a drama-free Fiesta.

• Pro tip: Before replacing, verify power, ground, and signal at the connector — many “sensor failures” are actually wiring or connector issues.

Popular questions about the 2020 Ford Fiesta crank-angle sensor

Where is the crank-angle (CKP) sensor on a 2020 Fiesta?
It’s mounted to the engine block and reads a toothed wheel on the crankshaft (or flywheel, depending on engine variant). On the 1.0L EcoBoost it’s typically accessed low on the engine, many techs reach it from underneath. Always refer to the Fiesta’s workshop manual for the exact location on the specific engine code.

What are the symptoms of a failing CKP on this model?
Expect intermittent no-start or long cranking, sudden stalling (especially warm), misfires, the rev counter dropping to zero, poor fuel economy, and the check engine light. Scan tools commonly show DTCs P0335–P0339 and an erratic or missing RPM signal.

Is replacing the CKP a DIY job?
It’s moderate for a competent DIYer with axle stands and basic sockets. Access can be tight, and correct torque, seal seating, and connector handling matter. If there’s any doubt, a qualified mechanic is the safer bet, particularly if a relearn/drive cycle is required after the install.