Question about 1996 Dodge Intrepid

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Does not start

1996 Dodge Intrepid, I do not get the fluctuation of 0.3 to 5 volts on the camshaft position sensor. I do have the 8 volts for the reference voltage. Could it only be the sensor itself or could there be another problem? I have replaced the computer, crankshaft position sensor and the ASD relay and have replaced the camshft position sensor. I have checked to make sure that the timing belt is intact and verified that the camshaft rotates (ring with square holes). The only trouble code I get is the camshaft position sensor (12). I have obtained an additional camshaft position sensor, but would like to know if something else could be at fault before I install another new one.

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  • frank_shockl Jul 24, 2009

    I had given you the wrong trouble code, it is code 54 instead of 12. The new sensor has a paper spacer. do you think that would be the proper spacing?

  • frank_shockl Jul 31, 2009

    I found out that it was the camshaft position sensor. The instructions in the box said to apply slight pressure to the sensor while installing.

  • frank_shockl Jul 31, 2009

    Thank You for your help, that was a diificult problem



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  • Dodge Master
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Make sure the sensor has the right gap to the cam, if the gap is wrong. Your going to have a sensor that will not read and also check the wire harness, look for any damages to the wire and clips that would cause a faulty reading. Sorry that is don't have the information on the proper gap, but i am sure the parts store or the parts counter at the dealer can help you with the information to install the sensor and gap it properly. This is of course that it is the cam sensor that is bad with the information you gave me. Good luck and keep me posted, be glad to help get your car running 100% again soon friend. 

Posted on Jul 24, 2009

  • Harvey N Tawatao
    Harvey N Tawatao Jul 24, 2009

    If the cam does not spin, and produce a signal, and the crank sensor shows engine speed, then the PCM will set a cam position sensor code due to loss of signal, even though the sensor is good, the cam (embedded magnet) must pass by the sensor in order to create a signal.

    Code 54 is no cam signal at PCM. You replaced the cam sensor but your still getting the code 54. Re-check the wire harness and camshaft sensor it self.

    Magnetic sensors can be checked by unplugging the electrical connector and checking resistance between the appropriate terminals. On a GM 2.3L Quad 4, for example, the sensor should read between 500 and 900 ohms. Always refer to the vehicle manufacturers test specifications when testing these sensors. Obviously, if you see a zero resistance reading (shorted) or an infinite (open) reading, the sensor has failed and needs to be replaced. If viewed on an oscilloscope, a magnetic crank sensor will produce a waveform. 

    A good magnetic position sensor should produce an alternating current when the engine is cranked, so a voltage output check while cranking is another test that can be performed. With the sensor connected, read the output voltage across the appropriate terminals while cranking the engine. If you see at least 20 mV on the AC scale, the sensor is good, meaning the fault is probably in the module, coil, wiring or computer.

    If your diagnosis reveals a faulty sensor, the only option is to replace it. With Hall effect sensors, the sensor must be properly aligned with the interrupter ring to generate a clean signal. Any rubbing or interference could cause idle problems as well as sensor damage. Magnetic shaft position sensors must be installed with the proper air gap, which is usually within .050 in. of the reluctor wheel on the camshaft.

    Sorry i just can't remember which sensor type your engine is running Magnetic or Hall effect sensor. Regardless you can check them both in the same manor. Keep me posted and hope this helps. 



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No-Start Diagnosis
The diagnostic procedure for EI (electronic ignition) systems varies depending on the vehicle make and model year. Always follow the procedure recommended in the vehicle manufacturer's service manual.
The following procedure is based on Chrysler EI systems. The crankshaft timing sensor and camshaft reference sensor in these systems are modified Hall-effect switches.
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