The Ford Expedition typically uses two camshaft position sensors, one on each cylinder head, to provide timing information to the engine control system.
Understanding camshaft position sensors in Expeditions
Camshaft position sensors monitor the position of the camshaft to help the engine control unit time fuel delivery and ignition. In most Expeditions, there are two sensors—one for each bank of the engine—ensuring accurate synchronization across the V- or twin-cam configurations used in recent model years.
Two sensors, typically: count and location
The following details describe the typical CPS setup on Expedition engines.
- Two sensors total, one on each cylinder head (bank 1 and bank 2).
- Location: mounted on the front of the engine on each head near the timing cover.
- Function: provides a timing reference to the engine control module to coordinate ignition and fuel injection.
In practice, the two-sensor arrangement is standard across common Expedition configurations, including the 3.5L EcoBoost V6 and various V8 setups. Always verify with your vehicle’s VIN-specific service data, as there can be variant details by year and engine option.
Symptoms of a failing camshaft position sensor
If a CPS begins to fail or produce erratic signals, the vehicle may reveal several symptoms during operation.
- Check Engine Light may illuminate, often with codes like P0340 or related Bank 1/Bank 2 CAM sensor codes.
- Engine misfires, rough idle, or hesitation.
- Difficulty starting or intermittent starting problems.
- Power loss or reduced performance under load.
If you notice these symptoms, a diagnostic scan and physical inspection of the sensors and wiring are recommended before replacing parts.
What to do if you suspect a CPS issue
Follow these steps to diagnose and address potential camshaft position sensor problems.
- Retrieve diagnostic trouble codes (DTCs) with an OBD-II scanner to confirm CPS-related codes.
- Inspect wiring and connectors at both sensors for damage, corrosion, or loose connections.
- Look for oil leaks or contamination near the sensor housings, which can affect readings.
- Test sensors or replace them if signs of failure are present and codes persist after reseating connections.
- Clear codes and perform a test drive to confirm symptoms have resolved.
If you are unsure or the issue persists, consult a qualified mechanic or Ford service center for VIN-specific guidance.
Summary
Across most Ford Expedition models, there are two camshaft position sensors—one on each cylinder head. This configuration supports reliable timing for both EcoBoost V6 and V8 engine variants commonly used in Expeditions. For any maintenance or replacement, always reference the vehicle’s VIN and year to confirm exact sensor arrangements.