54 No Cam Signal at PCM - (P 0340)

54 NO CAM SIGNAL AT PCM - (P 0340)





The camshaft position sensor, mounted on the rear of the cylinder head, is a Hall-effect sensor that provides input to the Powertrain Control Module (PCM) at pin 26. The PCM uses information from both the camshaft and crankshaft position sensors (pin 25) to determine injector synchronization and cam/crank synchronization. When the camshaft signal is lost, the PCM relies on the crankshaft signal to allow engine operation. This could result in fuel injection being 180° out of phase, which would result in deterioration of engine performance and an increase in emissions. Also, with the cam signal lost, cranking time may increase.

The Malfunction Indicator Lamp (MIL) is illuminated and a DTC is stored when the PCM recognizes signals from the crankshaft position sensor and detects no signals for five seconds from the camshaft position sensor.

This malfunction could possibly be caused by problems with any of the following components:

- Camshaft position sensor
- Camshaft position sensor wiring and related connectors (open or short)
- PCM