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1998 Dodge truck no start last code was po320 no signal from cam sensor you change cam sensor still the same problem voltage going in nothing coming coming out?
Wiki User
∙ 16y ago
There are a few possibilities here.
One is that the new sensor is bad. Sometimes a new part is defective and does not work or has been damaged during shipping or is an old part that has been returned as new by a dishonest person. It would be as good idea to look at the cam sensor signal on an oscilloscope if you have access to one.
Your wiring could be damaged If you don't have continuity on all wires between the sensor plug and the PCM, you need to fix that. An inexpensive ohmmeter or multimeter and a long lead can be used to easily check this. Also, with the PCM unplugged, use a voltmeter to check for voltage between each of the terminals at the sensor and battery + and also battery-. Any voltage indicates that wire is shorted and the short must be repaired.
You might have a bad crank sensor. On many Chrysler products the wiring internal to the PCM unit makes it difficult for software to differentiate between the crank sensor and cam sensor producing a bad signal. Sometimes it will set the wrong code.
There are other possibilities also, but these seem the most likely.
Wiki User
∙ 16y ago
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