...code P1684. I looked it up and got Contr. Unit programming communication error... what does that mean? You have an internal problem with the ECM. I had the very same thing with an 01 Concorde. I ...
...01 Dodge Caravan. What are those codes for? The P1684 code simply means that the battery has been disconneted within the last 50 starts. those would be po 1684 and po 135 this is your downstream o2 ...
...01 town&cntry: p1684 w/check engine light. On freeway and everything shut down, no power, etc. Had to tow. Put on battery charger altho battery was mostly charged. Flashers and radio worked but will ...
01 pt cruiser my car just died at a stop light yesterday .. it will turn over but not fire.. it put off 2 codes p0551 & p1684 .. battery disconnect and power steering switch.. the auto zone guy said ...
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