What usually causes it
- A failing camshaft position sensor
- A damaged wire or a loose, oily plug
- A stretched timing chain or belt
- An oil leak that soaked the sensor
P0340Starts at: Get it checked this week
Camshaft position sensor circuit problem (bank 1)
The camshaft position sensor tells the computer where the parts that open the valves are in their turn. The computer found a problem with its signal on bank 1, or the only one on the engine.
Check this first
Look at the plug on the sensor for a loose fit, oil or rust.
What to watch for
- Hard starting or stalling
- Rough running or weak power
- The car goes into a low power mode
Can I keep driving?
We rate P0340 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Quick answers about P0340
What does P0340 mean?
Camshaft position sensor circuit problem (bank 1). The camshaft position sensor tells the computer where the parts that open the valves are in their turn. The computer found a problem with its signal on bank 1, or the only one on the engine.
Can I keep driving with P0340?
We rate P0340 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
What usually causes P0340?
The most common causes, in order: A failing camshaft position sensor; A damaged wire or a loose, oily plug; A stretched timing chain or belt; An oil leak that soaked the sensor.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.