Parts for your 2007 Ford Focus-Crank angle sensor

2007 Ford Focus crank-angle sensor (crankshaft position sensor): purpose and servicing

Yes, the 2007 Ford Focus is fitted with a crank-angle sensor, commonly called the crankshaft position (CKP) sensor. This is documented in the Ford Focus 2005–2011 Workshop Manual (Ford Motor Company, Section 303-14A), the Haynes Ford Focus Petrol & Diesel 2005 to 2011 manual (No. 4806), and Autodata technical service information, all of which list the CKP sensor and related diagnostic trouble codes for this model range.

The CKP sensor tracks the exact position and speed of the crankshaft by reading a toothed trigger wheel (often a 36-1 pattern). The engine computer uses this live signal to time fuel injection and spark, and to synchronise with the cam sensor for sequential injection. On Ti‑VCT engines, it also supports cam phasing control. If the signal drops out, the Focus will crank but typically won’t start, if it’s noisy or intermittent, it can cause rough running, random stalling, or a dead tachometer.

On most AU/NZ‑market LS/LT Focus models (1.8/2.0 Duratec HE), the sensor sits low on the engine, near the gearbox bellhousing, reading the flywheel or crank trigger. There’s no scheduled replacement interval, it’s a “fit and forget” item, but worth a look during routine services—especially on higher‑kilometre cars—because heat, oil contamination, or a damaged loom can upset the signal.

• Common symptoms and codes: hard starting or no start, misfire, sudden stall, erratic tacho, codes P0335–P0339.
• Quick checks: inspect the connector for oil ingress or broken locking tabs, follow the harness for chafing, ensure the sensor face and trigger teeth are clean of metal debris.
• Replacement tips: disconnect the battery, raise the vehicle safely, and access from underneath. The sensor is held by a single bolt, swap like‑for‑like and tighten to the factory spec from the workshop manual. No shimming is required—the air gap is fixed by design. Use quality OEM‑equivalent parts.
• Good practice: rule out poor grounds and failing ignition coils first, a scan tool or oscilloscope helps confirm a clean CKP waveform before and after replacement.

Done right, a CKP sensor replacement is a straightforward job that restores smooth starting and reliable running, and it’s cheap insurance on an ageing Focus that’s begun to play up in traffic.

Where is the crank-angle sensor on a 2007 Ford Focus?

On most 1.8/2.0 Duratec HE engines it’s mounted low on the back of the engine block by the gearbox bellhousing, reading the flywheel/trigger wheel. Access is usually from underneath with the splash shield off. Some variants may place it at the front near the crank pulley, but AU/NZ models are typically bellhousing‑side.

Can you drive with a failing crank-angle sensor?

It might run but can stall without warning or refuse to restart when hot, which isn’t safe. A total failure usually means a no‑start. If there are P0335–P0339 codes or stalling symptoms, it’s best to diagnose and fix it promptly rather than soldier on.

How do you tell if it’s the CKP sensor or something else?

Check for CKP codes and look at live data for engine RPM during cranking—0 RPM often points at the CKP/harness. Inspect wiring and connectors first. If available, scope the CKP waveform. Coil, cam sensor, or fuel issues can mimic similar symptoms, so a quick systematic check saves guesswork.