What is a camshaft position sensor?
The camshaft position sensor, typically located on the cylinder head or block, keeps track of the camshaft’s position relative to the crankshaft and sends this information to the car’s engine control module (ECM)—i.e., the engine computer. The control unit then uses the data sent from the camshaft position sensor to manage ignition timing so the fuel injectors fire at the correct times. The cam sensor works in tandem with a crankshaft sensor to ensure that your engine runs smoothly.
If your vehicle’s camshaft position sensor is not working properly, the fuel injectors could remain open for longer than required, allowing too much fuel into the combustion chamber.
When should I replace the camshaft position sensor on my car?
Here are a few common signs of a camshaft position sensor problem:
An illuminated check engine light
If you have an OBD-II diagnostic scanner, the trouble code P0340 indicates a Camshaft Position Sensor “A” Circuit Malfunction. However, this code can also be tripped by issues with the crankshaft position sensor, the mass airflow sensors, or the timing belts.
How often should a camshaft position sensor be replaced?
Camshaft position sensors are made to last as long as your car, but they are exposed to intense heat from the engine and can wear down.
There is no mileage or time limit to camshaft position sensors, so you should watch for warning signs of a bad sensor and take your vehicle to a mechanic if you suspect you need a replacement.
Can I replace my camshaft position sensor myself?
You can complete a camshaft position sensor replacement at home. The replacement is relatively simple and can be a DIY project if you have the right tools.
Keep in mind: It’s vital to your vehicle’s overall performance that the job is done correctly, so if you’re not confident in your auto repair skills, take your vehicle to a mechanic.