Question about 2000 Dodge Intrepid

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2000 intrepid I checked the ground's I could find no change. I hooked the sterio back up and tried starting it, this time all it did was click click click, I then managed to get the car to spit out the ODS code P1684. I looked it up and got Contr. Unit programming communication error... what does that mean?

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  • Veinot Jun 13, 2008

    Can I use a diagnostic machine to confirm that it is the ECM/PCM?

  • Veinot Jun 14, 2008

    I got it hooked up to a computer this friday, the ECM is reporting to the computer and it registers the engine is turning over. The Crank sensor and cam sensors are working I'm still getting no spark. Error P1648 is no longer present and "no bus" has not shown up either. Engine turns over but there is no spark... is there anything else that might cause the pistons not to fire? Just before it died the oil light came on but it has lots of oil... if the oil pressure sensor is out could that cause no spark?

  • asaslib Jul 27, 2008

    engine caranking but no spark to start up

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  • 702 Answers

You have an internal problem with the ECM. I had the very same thing with an 01 Concorde. I replaced the ECM and restored communication and car started.

Posted on Jun 11, 2008

  • Lee Quiroz
    Lee Quiroz Jun 16, 2008

    If the oil pressure switch is bad it could give a false signal to the ECM and the computer will shut the engine down. What machine are you using to do your data stream. If it's a Snap On MT2500, That's what I use, Make sure the cam and crank sensors are in sync.

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