My vans speedometer wont work and every once in awhile it will fly up to like 160 and then back down to 0. When it does my van misses. All other gauges work- rpm,gas and thermostat. Tried resetting with the key in off position.my 2001 dodge caravan displays 1684,1282, 1495, and engine light on?

 

I'm going to guess either a bad output speed sensor or the wires at the sensor.

 

still no speedometer changed input, out put sensors, changed the transmission module on the fender wall. ???
The door locks dont lock when you start driving but sometimes they will lock later and when they do the speedometer bounces up and down and the engine wants to stall. No clue ? Very frustrating. Need help please