My Chevrolet Aveo 2007 had P0340 code and crank, but no-start condition. I bought a replacement camshaft position sensor. The P0340 code is not there anymore, but the car still does not start.
First of all, the new sensor that I just bought, presumably has misaligned screw holes, because it kinda leans to the right side more than the old sensor (see red arrow):
I have attached with my oscilloscope to orange and black wire:
The output on the new sensor to me looks even worse than from the old sensor, because now instead of regular even pulses:
I am now seeing one long pulse and one short pulse that repeats:
The questions I have:
- Am I expected to see nice square waves in osciloscope? Unfortunately, with neither of sensors the beginning of pulse was steep.
- Why with the new sensor I am seeing one long pulse? Is it because of sensor leaning to the right and that it does not take into account left gear hence "pulses are merged"?
- Why the code P0340 disappeared with the new sensor and does not return, but the car still does not start?
- What voltage should I see between black and orange wire? After turning key to ON but before cranking I see how voltage grows slowly over 10 seconds from 0V to 12V. And then when I crank I see waves of 2V amplitude as in oscilloscope pictures I have attached here. This has made me curious that perhaps PCM INPUT pin is leaking electricity?