Started up my 02 Disco2 this morning and the M & S Lights started flashing. I have Reverse, but Forward seems to be stuck in a high gear "limp" mode. Last night was the coldest night so far here in MN and the engine cranked overquite slowly as a result. Could this be related to a low voltage condition during startup?

My Disco has 31k miles on it and hte transmission has never given me any issues whatsoever. I checked/topped-up the trans fluid last year.

Any thoughts greatly appreciated.

JeffQ

 

As per your owners manual, it needs to get into a tranny shop to get the codes read and possibly cleared, If you are lucky, it won't be anything major, usually something simple like a bad connection or low voltage to the TCU.
Do not take it to the dealer, go to a small tranny shop and have it looked at.
Lets us know what they find.

 

Disco Mike,

Thanks for the answer.

Here's what I ended up doing.........I have known that the battery in my 02 D2 is not the right battery for the vehicle and is undersized. Last night was the coldest we have had so far this winter in MN, -7degF and this morning was not much warmer. As a result my Disco cranked over really, reallyslow -> Causing a low voltage fault, I think ......the garage is where the Maserati Indy and the wife's Volvo live....so the Disco sits outside []. I took the battery from my Maserati, which is the same as the one that Dodge Trucks use, is a lot larger,and put it into the Disco. The fault was there when I turned the key on initially with the new battery, but went away after I cranked and started the engine.......and has not yet re-surfaced.

Tomorrow A.M. will be a good test as the weather tonite is supposed to be near -10degF.

If the fault occurs again, I'll take it to the local tranny shop.

Fingers crossed in MN,
JeffQ

 

Sounds like a new battery is in your trucks future.
Low voltage can throw many different fault codes and certainly make for slow starting.
I run to Yellow Top batterys here in Colorado for my winch and other toys and as a side benefit I never have any low voltage issues.
Take care,

 

Mike,

I agree that the battery is probably the culprit and expect that I would come up with a low voltage code if I were check the TCU.

This morning it was -7degF. MyDisco cranked over with a lot more gusto using the borrowed batteryand w/o any fault codes triggering warning lights.

Question -> What is required to pull codes from the TCU? Will an OBD-II tool plugged into the diagnostic port pull those?

If so, it is time to invest in a Code Reader as the need to pull/diagnose codes seems to occur about every other month. That said, I love my Disco and am willing to put up with its eccentricities.........


JeffQ

 

Any good hand held will let you get into everything except the ABS, T/C, and some SRS faults.

 

Mike,

Great.

Thanks as always for the help.

JeffQ