I have a 1997 dodge grand caravan, while driving on the highway the rpm's jump way up and there is no power, service engine light comes on. pulled over shut the van off and waited approx. 10 min restarted and drove home, light stayed on, had my friend plug in a tester that shows codes and 2 codes came up po700 and po755. engine light has gone out and no problem driving in city so far. Trying to find out what the codes mean?

700 is a generic transmission code. It went to limp mode, that's why it drives like it does. Have the codes read with a newer /better code reader or a scanner. Find out what other codes are in there.

Have it scanned for free at Big autoparts stores and that should point you in right direction of faulty component. If not, get back to us with scan results.

Transaxle is gone,needs rebuild

Hello christina794 and thank you for asking your question, on Fixya.

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Thanks for the vote, and good luck!

Im assuming it is an engine that uses a timing belt. It sounds like the belt has jumped 1 tooth. if it only jumped 1 tooth than the computer will compesate the timing so it is possible the sensors will say they are ok. If it is a motor that uses a chain than it problaly needs a new gear/chain set.

I’m happy to help further over the phone at https://www.6ya.com/expert/david_c087e4b7d13c0163

take it to auto zone and they will check it for free.

youve got short where the wireing go thru the fire wall right on the backside of the glove box

Sounds like battery needing a jump start.

my car was doing the same..u should look at the waterpump c if there is any green stains on the drip hole.....also check forleaky hoses and holes in the radiator...i would check the waterpump first tho