Limp mode Hello, my '03 voyager 2.5 keeps going into limp mode. no pattern. I reset, and I can drive 2-20 miles. One year ago I replaced the computer ( could it be bad again?) the van has 112000K the trans was rebuilt @ 67K. This is getting old and expensive! Help! Rick

Hello Jeff Winner,

Over the last 20 years ... cars have has a LIMITED OPERATION FEATURE added... When the engine READS something that is not IMMEDIATELY catastrophic... it will allow you to
LIMP home... rather than a complete shut down.

Limp mode:
You SHOULD also have a CHECK ENGINE light... (?)

My best advice is to limp on down to your near-by FREE code reading shop... and have a READER tell you what CODES are registered...

A blocked exhaust system will also seriously SLOW your progress
((soon to stop all-together)).

Hope this helps

Check you exhaust prices BEFORE you go...!!

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1998 DODGE DURANGO 5 9L V8 Muffler RockAuto

This is known as "get me home" mode/limp mode.
It is designed for you to get the car safely to the side of the road. Needs to go to a garage as there is a fault somewhere which will probably need attaching to a computer to investigate.

Here's a link to your problem.

PO456 is most times a gas cap or gasket,
to get an incorrect gear ratio the transmission has probably started to slip.

Change the fluid and filter first off in the transmission and use only atf+4 fluid and possibly the govenor pressure sensor,and change gas cap.

take it to a transmission shop to be properly checked

check the trans fuse...it blowing, will keep the car in limp mode, either that, or you need to replace Solenoid B, 1/2 Shift Solenoids...

There is a problem with the transmission internally - it is in limp mode to protect it from damage - to confirm this is the problem, disconnect battery for a minute and then reconnect and drive -- should drive ok for a moment , but then go back into limp mode

YOU NEED TO CHECK POWER AND GROUND CIRCUITS TO TCM

It's in limp home mode. You'll have to check wire connections and electronic controls. If it has a vacuum modulator you can remove it and look for trans fluid on the vacuum hose side (meaning ruptured diaphram). Double check the parts you replaced as well, especially if they were used parts. My dad went through three speed sensors in one year on his Caravan. You should drop the pan after checking other components. It could be a bad relay, shorted module or wire. The three speed transmissions are much more reliable than the four speed overdrive transmissions but with age and miles things can go wrong and parts will wear out.

flush it, new oil, and add a can of trans fix if it doesn't shift or drops in to limp in mode