Parts for your 2001 Ford Mondeo-Crank angle sensor

2001 Ford Mondeo crank‑angle sensor (crankshaft position sensor) — purpose, servicing and replacement

Technical sources confirm the 2001 Ford Mondeo does use a crank‑angle sensor, typically referred to by Ford as the crankshaft position (CKP) sensor. Ford TIS (workshop manual) for the 2000–2007 Mondeo lists and tests the CKP in the Engine Management section, the Haynes Ford Mondeo Petrol & Diesel 2000–2007 manual (No. 4063) covers CKP location and diagnostics, and Autodata wiring diagrams for the 2001 Mondeo show the CKP circuit feeding the PCM. Functionally, this CKP is the same as a crank‑angle sensor.

On a 2001 Mondeo, the crank‑angle sensor reads a toothed wheel on the crank (often a 36‑1 pattern) to give the PCM precise engine speed and position. That lets the car time spark, fuel injection, and even monitor misfires. If it fails, it’s common to see hard starting, sudden stalling, dead tachometer while cranking, or a no‑start — the PCM simply doesn’t know where the crank is. Typical fault codes include P0335–P0339.

Location varies by engine: on the 1.8/2.0 Duratec HE petrol it’s mounted low on the block near the crank pulley, on the 2.5 V6 Duratec it’s down by the bellhousing/oil pan rail, and on the 2.0 diesel it reads the flywheel at the gearbox bellhousing. Access is usually from underneath with the splash shield off.

It’s not a scheduled service item, but it benefits from quick checks during routine servicing. Look for oil contamination, heat‑baked or rubbed wiring, loose connectors, and corrosion at the mounting boss. Keeping the sensor face clean and the harness clipped away from the driveshaft and exhaust goes a long way.

• Common symptoms: intermittent stall when hot, extended crank, no‑start, uneven idle, or random misfire codes.
• Quick workshop tips: verify battery health, check CKP connector tension, inspect reluctor teeth through the sensor hole if possible, and scope the CKP signal when chasing intermittent faults.

Replacement is straightforward:

1. Disconnect the negative battery terminal and raise the front safely.
2. Locate the CKP, unplug the connector, and remove the single retaining bolt.
3. Clean the mounting surface, fit the new sensor with a light smear of oil on the O‑ring.
4. Seat it fully, refit the bolt, and reconnect. Clear DTCs and perform an idle relearn after a short drive.

Most jobs run about 0.5–1.0 hour depending on engine and access. Use quality OEM‑equivalent sensors and follow the workshop manual for the exact torque and any air‑gap specification.

Popular questions about the 2001 Ford Mondeo crank‑angle sensor

Where is the crank‑angle sensor on a 2001 Mondeo?
On the 1.8/2.0 petrol it’s low on the front side of the engine near the crank pulley, on the 2.5 V6 it’s down near the bellhousing, and on the 2.0 diesel it’s at the gearbox bellhousing reading the flywheel. Access is typically from under the car with the lower cover off.

Do crank‑angle sensors wear out, or do they fail from wiring issues?
Both happen. The sensor can degrade from heat and vibration, but many Mondeo no‑start or stall faults trace back to brittle loom sections, oil‑soaked connectors, or poor earths. It’s smart to inspect wiring before condemning the sensor.

Should the CKP be replaced as preventive maintenance?
It’s not a scheduled replacement. If starts are clean and no fault codes appear, just inspect during regular servicing. Replace when you’ve confirmed a signal issue, physical damage, or persistent CKP‑related DTCs.