Parts for your 2012 Ford Mondeo-Crank angle sensor

2012 Ford Mondeo crank angle sensor (crankshaft position sensor)

Based on Ford workshop information (Ford ETIS/Workshop Manual section 303-14 for both Duratec and Duratorq engines), Haynes Mondeo manuals covering 2007–2014 models, and Autodata/Bosch ESI engine management references, the 2012 Ford Mondeo is fitted with a crank angle sensor, more commonly called a crankshaft position (CKP) sensor. All 2012 Mondeo engines—petrol (Duratec/EcoBoost) and diesel (Duratorq TDCi)—use the CKP sensor for engine synchronisation, ignition timing and fuelling control.

The crank angle sensor’s job is simple but vital: it watches a toothed wheel on the crankshaft and feeds precise position and speed data to the PCM. That live info is what the Mondeo’s brain uses to trigger spark (petrol), control injection timing, and manage cold starts, idle quality and emissions. Together with the cam sensor, it keeps everything in sync so the engine runs smoothly and efficiently.

While it’s not a scheduled service item, the CKP sensor deserves attention during routine servicing—especially on higher‑kilometre cars. A quick visual once-over under the bonnet for oil contamination, chafed wiring, loose connectors or metal debris stuck to the sensor tip can prevent drama later. If faults pop up, common OBD-II codes include P0335–P0339. Symptoms often show up as intermittent stalling, long crank/no start, rough running, a dead tacho during cranking, or the car dropping into limp mode.

• Typical signs it’s playing up:
  • Hard starting or no start when hot
  • Random stalls at idle or while cruising
  • Misfire-like behaviour and poor fuel economy
  • Check engine light with CKP-related codes

Replacement on the 2012 Mondeo is usually straightforward: the sensor is mounted at the gearbox bellhousing or low on the block (location varies by engine). Expect one retaining bolt, an O‑ring, and a keyed fit to the mounting boss. Tips that make life easier:

• Disconnect the battery and let the PCM power down before unplugging the sensor.
• Clean the mounting area, avoid pushing dirt into the bellhousing.
• Lightly oil the new O‑ring, don’t force the sensor—seat it square.
• Route the loom in the factory clips to keep it away from heat and driveshafts.
• Clear codes and, if specified by your scan tool for your engine, run a crank relearn/profile correction.

Quality matters here—go for a genuine Ford part or a reputable OE supplier. A dodgy sensor or poor connector fit can cause elusive intermittent faults that waste time and money. Most workshops will allow 0.5–1.0 hour for diagnosis and replacement, plus time for a road test and any relearn procedure.

Where is the crank angle sensor on a 2012 Ford Mondeo?
On most 2.0/2.2 TDCi diesels it’s mounted near the gearbox bellhousing reading the flywheel/reluctor. On many petrol Duratec/EcoBoost engines it’s low on the block at the transmission end. Access is usually from underneath, removing the engine undertray helps.

What are common symptoms when it fails?
Hot no-start, random stalls, uneven idle, poor fuel economy, erratic tachometer during cranking, and a check engine light with codes like P0335–P0339. Intermittent issues are common when the sensor is heat-soaked or the loom is chafed.

Does it need programming after replacement?
Often the PCM will learn on its own once it sees clean signals. Some engines benefit from a crank profile relearn using a scan tool to speed adaptation and stabilise idle. Always clear fault codes and verify stable RPM and cam/crank sync in live data.