There isn’t a single universal location for the camshaft position sensor on all Chevy engines; its placement depends on the engine family. In most modern Chevys, you’ll typically find it either on the timing cover at the front of the engine or on the back of the engine near the firewall.
Understanding the two most common placements
Chevrolet engines often place the camshaft position sensor in one of two broad spots. The exact location varies by model year and engine family, so checking a service manual for your specific VIN and engine code is always best.
Common front-or-back placements cover the majority of Chevy engines equipped with a camshaft position sensor. The front location sits near the timing chain/belt cover or harmonic balancer, while the back location sits along the rear of the engine, near the cylinder heads and firewall. Below is a quick guide to the typical front- and rear-mounted setups you’re most likely to encounter on Chevy platforms.
- Front of the engine (timing cover area): Many newer V6 and V8 engines place the camshaft position sensor on the front timing cover, near the crankshaft pulley or just above it. This position makes it easier to access from above the engine bay without removing major components.
- Back of the engine (valley/rear cylinder-head area): On several Gen III/IV LS-family engines, the camshaft position sensor is mounted at the back of the engine, in the valley near the firewall, facing the camshaft. Access may require removing the intake plenum or other nearby components.
In older, pre-OBD II Chevrolet engines that used a distributor-based ignition system, there may not be a dedicated camshaft position sensor as part of the ECU timing circuitry. If you’re working on a very late-generation or specialized Chevy engine, confirm that a CMP sensor exists and is the one failing, since some swap-oriented builds can alter sensor placement.
How to locate the sensor for your exact model
To pin down the precise location on your particular Chevy, follow these steps. This approach works across most modern Chevy passenger cars and trucks.
- Consult the vehicle’s service manual or a VIN-specific parts diagram to identify the CMP sensor’s exact mounting point for your engine code.
- Look for a small electrical connector and a short sensor protruding from the engine block or cylinder head. If you see a two- or three-pin connector with a compact sensor body, you’re likely near the CMP.
- Check both sides of the engine: the front timing cover area (near the timing chain/belt and harmonic balancer) and the back of the engine (near the firewall) where LS-family and other modern engines sometimes mount the CMP.
- When in doubt, remove the air intake plenum or use a mechanic’s mirror to inspect hard-to-see areas. A CMP located behind the intake or near the back of the heads is common on LS-based engines.
- If you have access to diagnostics, note codes related to cam/crank position (such as P0340, P0344, or related codes) to confirm you’re inspecting the correct sensor.
If you still can’t locate the sensor after checking the manual and visually inspecting the engine, consider seeking help from a qualified technician or an online forum that matches your exact Chevy model, year, and engine code. Photos of the engine bay with labels can also help others guide you to the right spot.
Summary
In most modern Chevys, the camshaft position sensor is either mounted on the front timing cover or on the back of the engine toward the firewall. The exact spot depends on the engine family (for example LS Gen III/IV tends to place the CMP at the rear, while other designs may position it at the front). Confirm the exact location for your vehicle using the VIN, service manual, or OEM diagrams, and inspect areas around the timing cover or the rear of the engine to locate the sensor.