Tech notesSometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.
When is the code detected?The camshaft position sensor signal is not detected by the Engine Control Module(ECM) during the first few seconds of engine cranking
P0340 Kia DescriptionThe Camshaft Position Sensor (CMPS) is a sensor that detects the compression TDC of the NO. 1 cylinder. The CMPS consists of a hall type sensor and a target on the end of the intake camshaft. When the target triggers the sensor, the sensor voltage is 5V. If not, the sensor voltage is 0V. These CMPS signal is sent to the Powertrain Control Module (PCM) and the PCM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.
2003 Kia Sedona Camshaft Position Sensor (CMPS) Location