The crankshaft position sensor (CKP sensor) on a 1999 Ford Zetec 2.0L engine is located on the
transmission bellhousing, near the crankshaft. It's usually positioned pointing towards the crankshaft pulley. You'll need to look carefully at the bellhousing; it's a relatively small sensor. It might be held on with a single bolt.
Accessing it will require working under the vehicle, likely needing to remove some under-tray components for better visibility.
