Parts for your 2011 Ford Fiesta-Crank angle sensor

2011 Ford Fiesta crank-angle sensor (CKP): fitment, purpose and servicing

Based on technical sources, the 2011 Ford Fiesta does use a crank-angle sensor, commonly listed by Ford as the Crankshaft Position (CKP) sensor. It’s a core input to the Powertrain Control Module (PCM) for engine timing and is not optional on these engines.

• Ford Workshop Manual for WS/WT Fiesta (2008–2013), Section 303-14 — Electronic Engine Controls: CKP sensor description, diagnostics and R&,I.
• Ford wiring diagrams for 2011 Fiesta: CKP sensor shown as a two/three‑wire Hall or magnetic sensor feeding the PCM.
• Aftermarket service data (Autodata/Haynes/ALLDATA): CKP fitted on 1.6L Duratec Ti‑VCT petrol and Duratorq TDCi diesel variants.

On the 2011 Fiesta, the crank-angle (CKP) sensor keeps the whole show running. It tracks crankshaft speed and position so the PCM can fire injectors and spark bang on time. Lose that signal and the engine can crank but not start, or it’ll cut out randomly. It also helps the PCM detect misfires and keeps idle smooth, especially with the Fiesta’s variable valve timing.

Location-wise, it’s typically mounted low on the block, reading a toothed reluctor on the crank or flywheel/bellhousing area. Ford calls for a specific air gap between sensor and tone wheel, and a clean, undamaged connector. Oil contamination, heat, or a cracked harness can upset the signal.

As part of servicing, this sensor isn’t a “replace by kilometres” item, but it’s worth a quick look any time the car’s on a hoist. Check for oil leaks onto the sensor, brittle wiring, loose retaining bolt, and corrosion on pins. If there are intermittent stalling issues, long crank, or the MIL with codes like P0335–P0339, put the CKP and its wiring high on the list.

Replacement is straightforward for a trained tech: disconnect the battery, gain access from underneath, unplug the connector, remove the retaining bolt, twist and withdraw the sensor, lightly oil the new O‑ring, and refit. Torque the bolt to workshop manual spec and clear codes. Always verify the signal with a scan tool and, if needed, a scope. On high‑km cars, it’s smart to clean the mounting bore and check the tone ring for damage. Keeping the area dry (fix any weepy front or rear main seals) will help the new sensor live a long life.

Genuine or OE‑quality sensors are recommended, cheapies can cause phantom faults or hard starts. A brief road test and warm restart check should finish the job nicely.

Popular questions

What are the symptoms of a failing CKP on a 2011 Fiesta?
Common signs include intermittent no‑start, sudden stalling while driving, rough idle, misfire feel, or the MIL on with P0335–P0339. Sometimes it’ll crank longer than usual before firing, especially when hot. Wiring faults to the sensor can mimic the same symptoms.

Can they drive with a bad crank-angle sensor?
Not reliably. The car may start and then die, or it might not start at all. Even if it runs, it can cut out without warning. Best bet is to diagnose and repair before it leaves them stranded or causes unsafe loss of power in traffic.

How long does replacement take and what might it cost?
On a hoist, a competent tech generally sorts it in about 0.6–1.0 hours, plus time for diagnostics. Parts pricing varies by brand, OE‑quality is worth it. Add a bit if the connector or harness needs repair, or if access shields have to come off.