Parts for your 2018 Ford Fiesta-Crank angle sensor

2018 Ford Fiesta crank angle sensor (CKP): what it does and how to look after it

Technical sources confirm the 2018 Ford Fiesta is fitted with a crank angle sensor (usually called the Crankshaft Position Sensor, CKP). Ford’s Workshop Manual for the 2018 Fiesta powertrains (including the 1.0L EcoBoost and 1.5 TDCi), Autodata engine management references, and Haynes service literature all list a CKP sensor and associated diagnostics (e.g., DTC P0335 series). Bosch engine management texts also outline the typical 36-1 reluctor/Hall setup used by Ford on late-model small engines. So yes—this part is relevant and used on the 2018 Fiesta.

On the 2018 Fiesta, the crank angle sensor feeds the ECU precise crankshaft position and speed data. That timing info is the heartbeat for fuel injection, ignition timing, turbo strategies, and misfire monitoring. Lose that signal and the engine may crank but not start, cut out randomly, or run rough with the MIL on. Because modern Ford ECUs rely on a crisp CKP signal to sync with the cam sensor, a flaky CKP can feel like a bunch of unrelated drivability gremlins.

As part of normal servicing, the CKP isn’t a scheduled replacement item, but it’s smart to give it some attention:

• Inspect the wiring and connector near the sensor (typically mounted low on the block by the bellhousing on EcoBoost and TDCi variants). Look for oil wicking, heat-hardening, or chafing.
• Scan for fault codes such as P0335–P0339 and check live data for RPM dropouts during a warm idle and gentle blips. Any erratic readouts warrant a closer look.
• Keep oil leaks in check—contamination can interfere with the signal if it migrates to the sensor or trigger wheel.

Replacement is usually straightforward for a competent tech: disconnect the battery, unplug the sensor, remove the retaining fastener, swap the sensor and O-ring (lightly oil the seal), route the loom correctly, and torque to spec. On some Fiesta engines the ECU performs a crank correlation relearn automatically after a few drive cycles, others may benefit from a scan-tool crank variation learn. Using genuine or high-quality OE-equivalent parts is worth it—cheap sensors often introduce intermittent faults that are maddening to trace.

Common symptoms owners might notice include hard starting, sudden stalling at lights, a tacho that drops to zero while cranking, or a MIL with reduced power. If any of these pop up, a quick diagnostic and, if needed, a new CKP can restore smooth, economical running. For everyday maintenance, keeping the loom tidy, clips intact, and the area free of grime goes a long way to a drama-free Fiesta.

• Is a crank angle sensor the same as a crankshaft position sensor on a 2018 Fiesta?
• Where is the CKP sensor located on the 2018 Ford Fiesta?
• Does a new CKP sensor need a relearn on a 2018 Fiesta?

Is a crank angle sensor the same as a crankshaft position sensor on a 2018 Fiesta?
Yes. In Aussie and Kiwi workshops it’s common to say “crank angle sensor,” while Ford service info calls it the Crankshaft Position (CKP) sensor. It’s the same part, providing the ECU with crank position and speed.

Where is the CKP sensor located on the 2018 Ford Fiesta?
It’s typically mounted low on the engine block near the transmission bellhousing, reading a toothed wheel on the crank. On 1.0L EcoBoost and 1.5 TDCi variants, access is from underneath, a torch and patience with the loom routing helps.

Does a new CKP sensor need a relearn on a 2018 Fiesta?
Often the ECU will adapt after a few key cycles and short drives. Some engines benefit from a scan-tool crank variation (profile) learn to tidy up misfire monitoring. If an idle feels a touch off after replacement, a quick relearn procedure can sort it.