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The camshaft position sensor tells the engine control unit the angle of the camshaft rotation. This is necessary to determine the exact timing of fuel injection and ignition. The failed sensor may cause a number of problems, from poor fuel economy to the engine failing to start.

In my case the symptom was that the engine would only start after 3-4 attempts of hard, determined cranking. Of course, the malfunction indicator light was on. To confirm that the camshaft position sensor is indeed at fault you will need an OBD2 fault code reader or a similar diagnostic tool.

The fault codes indicating the camshaft position sensor malfunction are in the range of P0340-P0349 -- for me it was P0343.

I used my Vgate Scan Bluetooth-connected scan tool and the Car Gauge Pro Android app. The OBD2 tool plugs into the diagnostic socket, which is located under the driver side of the dashboard, roughly above the driver's left knee.

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