Code P0340 2009 Hyundai Sonata 2.4 gls

2009 Hyundai SonataWe have a code p0340 CEL and the camshaft sensor has been changed. I need to replace the 3 wires in the harness from the ECM to cps could you provide the wiring diagram? It is a 2009 Hyundai Sonata 2.4 GLS.


Hyundai Code P0340 – Camshaft Position Sensor ‘A’ Circuit Malfunction Bank 1 Or Single Sensor

First of All the Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. Therefore this information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. Hence the camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.

When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. As a result the changing gap causes the magnetic field near the sensor to change. While the change in the magnetic field cause the voltage from the sensor to change.

In conclusion when the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

Code P0340 Possible causes

– Faulty Camshaft Position Sensor
– Camshaft Position Sensor harness is open or shorted
– Camshaft Position Sensor circuit poor electrical connection
– Faulty starter motor
– Starting system circuit
– Dead (Weak) battery

Camshaft Position Sensor Wiring Diagram

Code P0340 camshaft sensor wiring diagram 2009 Hyndai Sonata 2.4L


2 thoughts on “Code P0340 2009 Hyundai Sonata 2.4 gls”

  1. My stepson has recently purchase a car like this but engine light comes on periodically with the cam sensor code and when he starts doing 40km or lower she starts bucking and sputtering then stalls out..sometimes hard to start…then all of a sudden she’ll start again and good to go…very frustrating as it’s only when he slows down to stop at an intersection, or drive thru, or parking lot! Not to mention dangerous! Please help!!

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