Two for the common 4.0-liter V6 versions, and one for the 2.5-liter four-cylinder variants. The exact count depends on the engine your Frontier uses.
What a camshaft position sensor does
A camshaft position sensor (CMP) tracks the position of the camshaft(s) to help the engine control unit time ignition and fuel delivery. If the CMP sensors fail or give erratic readings, you may experience hard starting, stalling, misfires, or reduced performance. Knowing how many CMP sensors your engine has is important for diagnosing timing and sensor-related issues.
Engine options and CMP sensor counts
Below is a quick guide to CMP sensor counts by engine option commonly found in Nissan Frontier models. This helps you identify how many sensors you should expect on your particular truck.
- 4.0L V6 (DOHC): Two camshaft position sensors — one for each camshaft (intake and exhaust). They are typically mounted near the top of each cylinder head.
- 2.5L four-cylinder (QR25DE or similar): One camshaft position sensor. It monitors the single camshaft used by this engine family.
The counts above reflect the most widespread configurations seen in modern Frontiers. If your truck uses a different or earlier engine variant, verify with the service manual or a trusted parts diagram for your exact year and trim.
Symptoms of CMP sensor problems to watch for
Common signs of a failing CMP sensor include hard starting, rough idle, stalling, reduced fuel efficiency, and check engine light illumination with trouble codes related to cam timing or sensor circuits. If you notice these symptoms, inspect or test the CMP sensors and their wiring as part of your diagnostic process.
How to locate or replace CMP sensors
To locate CMP sensors, consult your vehicle’s service manual for the exact engine code and sensor locations. On the 4.0L V6, expect sensors near each camshaft area on the cylinder heads. Replacement usually involves Disconnecting the harness, removing mounting bolts, and installing a new sensor with the proper torque specification. Always clear codes after replacement and perform a basic idle relearn as required by your vehicle’s ECU.
Summary
In summary, the Nissan Frontier’s camshaft position sensor count depends on the engine. The widely used 4.0L V6 has two CMP sensors, while the 2.5L four-cylinder variants have one. Always confirm the engine type for your specific model year to determine the exact sensor count and location.