Possible Causes
NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.
- Faulty camshaft position sensor
- Camshaft position sensor harness is open or shorted
- Poor electrical connection in the camshaft position sensor circuit
Description
The camshaft position sensor is an electronic device used in an engine to record the speed at which the camshaft rotates. This information is used by the Engine Control Module (ECM) to control ignition and fuel injection. The camshaft position sensor detects the retraction of the camshaft (intake) to identify a specific cylinder. The camshaft position sensor detects the piston position. The sensor system consists of a rotating part, typically a disk, as well as a static part, the sensor itself.
When the engine rotates, the high and low parts of the teeth cause a change in the gap with the sensor. The changing gap results in a modification of the magnetic field near the sensor. The change in the magnetic field causes a variation in the sensor voltage.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor instead provides various commands for engine components, using the timing of cylinder identification signals.
P1341 Mazda Code – Range/performance of camshaft position sensor circuit “B”
How to Repair
Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine maintenance warning light soon)