What would cause an 02 t&c speedometer to stop working & not shift into overdrive? Codes p1193 & p1684 came up on dash. Van was shifting fine before that

Christophe Thompson

• 1224 Answers
• Posted on Jun 10, 2008

SOURCE: Instrument cluster failure causes fuse #29 to blow.

ok it could be quite simple
lets look at wrong size fuse
example 15 and you need a 25 fuse
also if you did any work on vehicle its quite possible that you grounded something out wrong retrace your work and fix accordingly
bad cluster relay is another problem that would cause these problems

SOURCE: 2001 dodge neon

Excuse i need information my car have the code P1193

SOURCE: won't shift out of low,speedometer doesn't work

see my comments, not 100% sure that it was the out put speed censor or not, but after reconnecting the wires to a new censor and reconnecting the battery and clearing codes it worked. connection was not clipped may have been loose

Mike Butler

• 6674 Answers
• Posted on Jan 11, 2009

SOURCE: hard down shift

I've read article after article on Chrysler forums where anything other than Autopar ATF in their transmissions cause problems, erratic shifting, etc, including what your experiencing. The techs that deal with it daily through Chrysler/Dodge shops, say there is some properties or chemicals in Autopar fluid, that others just don't have, no matter what they say, and they have proven it, time after time, with symptoms that disappear, just by changing fluids to Autopar. My wife's relatives own one of the more respected & trusted repair shops in our area, and they swear by that rule too, because they've also experienced it in the past. I'm naturally assuming you know that your experienced enough to know how to install filter properly & what to watch for, so with that said, I hate to say it, but Mopar ATF4 is the one & only fluid for best results. P.S. I recently had my transmission with 260,000km. replaced at Ontario Reman, whom back when I was with Chrysler, was the sole supplier of rebuilt engines & transmissions for Chrysler. When I questioned them on the fluid in my new/rebuild they responded with same answer, Mopar ATF and nothing else. If you do some googling on it, you'll find many that went to quick lube or similar for same service only to experience shifting problems etc after. Switched back to autopar as advised & problems went away. Can't say 100% that's your problem, but if it were me, I'd change it.

SOURCE: 1995 ford econoline van speedo/trans

It is either the speed sensor, the wireing in between ot the speedometer module it self. The sensor sends pulse train signal to the speedometer module and there it drives the speedometer and is divided in frequency by about 7 and feed to the computer and the cruise control. When the signal drops the Engine management computer thinks the speed is real slow and raises the transmission pressure.

In the one I had it was a cold solder jooint on the bacjk of the speedometer module itself but this was the divided output and the speedometer itself still worked. The easyest part would be the sensor that mounts on the rear axile I believe and should cost less than 30.00 dollars. If not that thebn it's the wiring or the speedometer module electronics..