Question about 1999 Chrysler 300M

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1999 chrysler 300m shaft cam sensor is bad.

I have a 1999 chrysler 300m. while driving the car shuts down and won't turn over soon after. i took it to auto zone and had it tested and the machine read shaft cam position sensor circuit malfunction. i replaced that and it still read the same thing and contiue to cut off. could it be the throttle body position sensor.

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  • Don Cahala Jul 03, 2012

    When you say "won't turn over" do you mean no spin on the starter, or it spins, but will not start? Try to detail your clues a bit closer so it is clearer to us for diagnosing these things, please. When you replaced the camshaft sensor did you leave the paper stickie on the end of the sensor when you bolted it in? That stickie is a spacer that is required to remain on when it is bolted in. Without that spacing as it is tightened, it may touch the cam and not be able to sense the rotational movement. (the spinning of the camshaft will wipe the stickie off the face of the sensor on the first spins, so it spaces itself that way.



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This is a known problem with these vehicles. Never jump to conclusion as I am going to state, but it's the computers. They have a bad asd Auto Shut Down Circuit and they show a cam position sensor circuit failure. This comes from a short in the PCM Powertrain Control Module. Check the three wires to the cam sensor with the key on. One is a 5 volt reference, 12v and PCM of computer signal. It seems that the short will give you something around 8.5 volt reference instead of 5. It has to be 5 volt + or - .5 only as in it can be 4.5-5.5 volts. Also it is known that it can and will clatter the Auto Shut Down Relay.

Posted on Nov 21, 2015

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Did you check the ASD relay,located under the hood in the fuse and relay box. hope this can help.

Posted on May 14, 2010


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Hi theoriginalj, have the CPS (cam positioning sensor) and the CSS (crankshaft sensor) checked as soon as possible either one of these has caused a lot of problems for the 300M good luck and hope this helps you. let me know how you make out in the event it may be another problem take care

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