Code P0341: Cam/Crank Error: Notes
During cranking, Ignition Control Module (ICM) monitors crankshaft position sensor signal. Signal is used to determine correct cylinder pair to spark first. ICM processes signal then sends a fuel control reference pulse to PCM. When PCM receives this pulse, all 6 injectors will be commanded to open for one priming shot of fuel in all cylinders. After priming, injectors remain off for the next 6 fuel control reference pulses from ICM (2 crankshaft revolutions). This allows each cylinder a chance to use fuel from priming shot.
During this waiting period, a cam pulse will have been received by PCM. PCM will now begin to operate injectors sequentially based on true camshaft position. With engine running, PCM monitors cam and fuel control references pulses received and expects to detect 6 fuel control pulses for each cam pulse.
Code P0341 will set when ratio of fuel control pulses to cam pulses does not equal 6 for 10 occurrences during key cycle.
- Determines if conditions necessary to set Code P0341 exist.
- If 5 volts are not present at PCM harness connector terminal cam signal circuit, camshaft position senor may be interfacing with magnet in camshaft sprocket. Bumping starter should correct this condition.
- If a failure is induced in fuel control reference circuit, 5 volts on circuit should change when faulty wiring or connection is manipulated.