Parts for your 2012 Ford Fiesta-Crank angle sensor

2012 Ford Fiesta crank angle sensor (crankshaft position sensor)

Yes, the 2012 Ford Fiesta is fitted with a crank angle sensor (commonly called a crankshaft position or CKP sensor). This is confirmed in Ford’s factory Workshop Manual for Fiesta (2011–2013) Engine controls, wiring diagrams for the PCM/CKP circuit, and mainstream technical databases such as Autodata and the Haynes Fiesta 2008–2017 manual. Ford’s OEM parts catalogues for the Mk7 Fiesta also list a CKP sensor across the 1.25/1.4/1.6 Duratec petrol and 1.6 TDCi diesel engines.

The crank angle sensor’s job is to tell the Fiesta’s PCM exactly where the crank is in its rotation and how fast it’s spinning. Using a toothed reluctor wheel on the crankshaft, the sensor generates a precise signal the PCM uses to fire the coils and injectors at the right moment. Paired with the cam sensor for phase information, it keeps starting crisp, idle steady, and power delivery smooth while trimming fuel and timing to suit Aussie and Kiwi conditions.

There’s no scheduled replacement interval for the CKP, it’s a “replace on condition” item. As part of regular servicing, it’s smart to check the sensor connector for oil intrusion, cracked insulation, or a loose retaining clip, and to ensure the harness isn’t rubbing near the bellhousing or subframe. Typical warning signs include:

• Hard starting or no start when hot, random stalling, or sudden loss of power
• Rough idle or misfire with the tacho dropping to zero
• Stored DTCs like P0335–P0339 or P0322

Diagnosis is best done with scan-tool live data (engine speed signal present during crank) and, ideally, an oscilloscope to view the CKP waveform. Always rule out wiring damage and poor earths before blaming the sensor.

Replacement is straightforward: disconnect the battery, gain access (often by removing the airbox), unplug the sensor, then remove its single retaining bolt and O-ring. Fit a quality OE-equivalent sensor, lightly oil the new O-ring, route the loom as per factory clips, and torque the bolt to spec per the Ford Workshop Manual. Clear any codes, start the car, and road test, the Fiesta’s PCM typically doesn’t require programming, and crank profile relearn is usually automatic after a short drive cycle.

Location note: on most 1.6 Duratec Ti‑VCT petrols it’s mounted at the gearbox bellhousing reading the flywheel, some variants place it low on the block near the crank pulley. Always verify by VIN in service data.

FAQs

Where is the crank angle sensor on a 2012 Ford Fiesta?
On many 1.6 Duratec Ti‑VCT petrol models it’s at the back of the engine where it meets the transmission bellhousing. Other engines may have it low on the block near the crank pulley. Checking a VIN‑specific Ford workshop diagram is the quickest way to pinpoint it.

What fault codes point to a bad crank angle sensor?
Common Fiesta codes include P0335–P0339 (CKP circuit range/performance, A/B, intermittent) and sometimes P0322. If the engine speed signal drops out while cranking or driving, suspect the CKP or its wiring.

Do I need to program the sensor after replacement?
No special programming is usually required. Clear the DTCs, start the engine, and complete a short road test. The PCM typically relearns any needed profiles automatically.