What Does P0340 Mean?
The camshaft position sensor located in the internal combustion engine, monitors position and the rotational speed of the camshaft. The sensor sends this information to the Power Control Module (PCM) and the PCM uses this information to control ignition spark and fuel injector timing. When the trouble code P0340 is set, the ignition spark and fuel injector timing fails due to a number of reasons.DEFINITION
The CPS is an electronic device that is usually utilized in an engine to easily and
quickly record the rate at which the camshaft is spinning. This information is basically used by ECM (also known as the Engine Control Module) that has the ability to control fuel injection and ignition. In addition to this, the camshaft position has the ability to sense the piston position. Apart from this, the sensor system consists of actual sensor, static part and rotating part. Once the engine is running, the low and high parts of the teeth cause the gap with the sensor to change. This is one of the reasons why the changing gap causes the magnetic field near the sensor to change. In this way, the magnetic field can cause the voltage from the sensor to change. When the crankshaft position sensor becomes inoperative, the camshaft position sensor provides different controls of the engine parts with the use of timing of cylinder identification signals.
What are the symptoms of the P0340 code?
Loss of engine powerMisfiring or rough running
No start or hard starting
Engine stall
Engine light ON or service engine soon warning light
Vehicle will not start – may be difficult to start
Vehicle engine misfire
Loss of power when driving
P0340 Causes
The error code P0340 most likely means that one or more of the following has happened:A connector or wire in the route circuit could be broken, shorted or grounded.
Faulty PCM
Open circuit
Faulty crankshaft position sensor
Dead or weak battery
Starting system circuit
Faulty starter motor
Poor electrical connection of the camshaft position sensor
The harness of the camshaft position sensor is shorted or open
Faulty camshaft position sensor
P0340 Possible Solutions
With a P0340 code, diagnosis can be tricky at times. Here are some things to try:Visually inspect all the wiring and connectors in the circuit
Check for continuity in the circuit wiring
Check the operation (voltage) of the camshaft position sensor
Replace the camshaft position sensor as required
Check the crankshaft position circuit as well
Replace circuit wiring and/or connectors as required
Diagnose/replace the PCM as required
