The 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 PCM and the PCM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.
The PCM monitors the camshaft sensor signal transition position which must change only once per crankshaft revolution. If no camshaft signal is detected while crankshaft signal is detected, the PCM sets DTC P0340.
Item
Detecting Condition
Possible Cause
DTC Strategy
Check camshaft signal switching
Open or short in signal, ground or power supply circuit
Poor connection or damaged harness
Misadjust crankshaft and camshaft pulley position
Faulty CMP sensor
Enable Conditions
6V< Battery voltage < 16V
No crankshaft error
Threshold Value
No camshaft edge detected
Diagnostic Time
40 revolutions
Mil On Condition
2 Driving Cycles