hi all, new poster here. I have some issues with this 02 grand caravan with 3.3L flex fuel. has roughly 200k miles (but theres a reason) my van is stuck in limp mode and wont shift from 2nd gear, And my speedo and tack go wacko

I ran a scanner on this and came up with codes for a faulty trans control solenoid (replaced it) codes for the input and output speed sensors(replaced those) tps low input code and changed that. checked all wires that i can see with out tearin everything apart. also.. i did check the trans control mod that seemed ok.

also changed the tran filter and fluid with the atf 4+ ( previous owner said he had just did it but didnt say what fluid he used) will let u know i have owned this van 1 month grr
codes i have gotten..(lost my paper and cant remember all codes but.. p0700 p0731 +32 p0841 p0121 +22 p0736 are some.

I might be missing something but can someone help me out here with this being in limp mode? please!!

ok so to update , i ran the scanner again and what i get now is p0121 Throttle/Pedal position sensor A circuit , p0122 tps low input, p1698 (2 times) and p0700, but cant drive it much wont for faster than like 25-30

 

Be thankful you don't have limp-mode on a 3rd gen. It can be anything from a old battery to a loose TCM wiring splice capped inside the main wiring loom.. There is also a plastic part inside the transmissions that is the fault a lot.. The TCM itself can even go bad somehow..

Sad thing is, I think 4th gen can still have trans issues as a result of something not even related to the trans bus. Like a loose ground or even BCM issue.. People will give educated suggestions here but you will go through a lot of suggestions before you either fix it or have to replace things that later will go bad again..

 

thanks for the reply. but my van is a 4th generation

still could be a battery issue possably. will have that checked,
grounds i have checked looked good.
havent found any bad/broken wires
I did take the harness off the tcm there was some corrosion in there. cleaned it up but didnt help. mayb replacing the tcm with a junkyard part will help? idk

BCM. where is that locate?

 

updatek i got the van out of limp-in-mode and fixed the tps codes-.. was a bent pin in the transmission control module! not sure how that happened. but had the van at the mechanics for 6 days and they couldnt figure out what was wrong.. LOL..

but this van still dont want to shift right.and drops to 2nd gear like its in limp mode but can get it to shift if shut off van. i still get code p0720 for the output shaft speed senser but that was replaced last month. also get code p0845 p0732 p0734 p0700x2could someone help me out here please?

also when shifting it will shift 1st 2nd slowly to 3rd and when its time to shift to 4th it kicks(jumps back and forth) from 3rd to 4th, 4th to 3rd couple times, like it dont know what gear it should be in, then it will drop to 2nd gear. and have to stop put in park and most of time i can just drive off if i place gear in 3rd and not drive..

 

How bad was that corrosion? Is there a chance it's also into the connector and working on the wires inside of the plastic where you can't see them? I recall other folks posting similar issues with our early 4 gens.

 

Hi CV2003 , the corrosion wasnt too bad, i dont think. light colored where u could take a paper towel and wipe it away clean.. the connector looked goood with a flash light lookin in to the connector.
also should say that when i put this van in gear reverse drive 3rd or low the spedo goes up with foot on break pedal and not moving. and when i go to take off it acts like its in 2nd or 3rd gear. have to shut it off and start over... this is really frustrating me..

 

My first guess would have been the ouput speed sensor, but you've already swapped that out. You've got a PITA there - hope you get it figured out soon!

 

My suggestions: Electrical grease all grounds and TCM plug with negative disconnected, if still a problem Lucas the trans fluid like I do after a fluid and filter change..

4th gen shares a few problems with 3rd gen at least with 41TE: Trans control valve leaks and repeated wear, a cracked internal plastic piece that should be metal and has a metal replacement, speed sensors that seem to fault too much..

Also since I've been learning about these, veteran mechanics say it's not a Caravan problem. It's a high mileage American front wheel drive problem.. Seems American makers really suck at front wheel drive transmission design. Interesting because I've had Ford compacts go 300k with 0 trans problems..

 

a cracked internal plastic piece that should be metal and has a metal replacement

. whats this you are speaking of? i wouldnt want to drop the pan again but if i exhaust everything else i could give it a shot.

 

still cant figure this out. just put the scanner/code reader on again pulled these, p0845 p0841 p0732 p0734 p0720 p0700(2x). now i have checked cleaned all wires. all looked good. mechanic said they checked wires also said was good.

this thing slips right from the get go like it isnt engaging in 1st gear almost like its stuck in 2nd or 3rd. same for reverse slips or shudders like not fully engaged. but getting better, last week it only was in 1 gear now it will shift iin all gears except 4th gear, i get nothing in that gear at all just revs like neutral then drops to 2nd till i slow down to 40ish then it shifts to 3rd, so just drive in 3 not in D it works. can go 50 mph in 3rd at 2200rpms or so.

the spedo still acts up ( says 20 mph in any gear sitting still more so when the heater in on) and the odo ticks away even when in park at idol

master-tech you have any ideas?