My 2001 mitsubishi montero sport anti lock light came on with a flashing green symbol of a frame with wheels, my service engine light came on at the same time, it appears sometimes while driving that the entire frame of the truck is going to fail. What is the problem, the car also seems a little sluggish?

Fix your car right away by clicking the link I attached
MITSUBISHI MONTERO SPORT SERVICE REPAIR MANUAL 1999 2000 2001 2002 DOWNLOAD

If you are referring to "anti-lock brakes", or "ABS", it means that when you depress the brake pedal hard enough, your computer recognizes the pressure and pulsates the brakes to prevent your wheels from locking up and the traditional skidding you see in movies.

ABS stops you quicker in emergency situations.

This means there is a problem with the four wheel drive

They will do that when one wheel is going faster than the others.

i had the same issue with the 4x4 light flashing and the anti-lock brake light on while in 2wd. what seemed to fix the problem was to have the sensors for them cleaned periodically. i had a shop do it so im not really sure where they r located.

These do not seem related to me.
For ABS and traction light, please see my tip at http://www.fixya.com/cars/r6003525-abs_traction_control_lights . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me.

for service engine, please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check.

for frame, please explain the symptom you experience.

try checkin your starter motor

I have the same problem, changing to 4 wheel drive works ok but 4WD light keep flashing. I was told that it needed a solenoid switch.

This was a weakness of the Montero Sport models. If you google Montero Sport 4WD light flashing you will find lots of information. The best troubleshooting article I have found is here: http://4wd.blogeasy.com/article.view.run?articleID=318776 This article is about the Pajero, but the Montero Sport uses the same platform so this article applies.

The Montero Sport uses several switches and vacuum modules to put the system in and out of 4WD. If any of these malfunction, the light may flash continuously, flash intermittently, fail to come on, and it can trigger the anti-lock brake light to come on. In brief, if the 4WD shift lever is engaged, but the transfer case doesn't engage, the sensors show a mismatch and will cause the light to act funny including triggering the vehicle's anti-lock break light. These SUV's need to be shifted into 4WD regularly to keep the switches and mechanisms working correctly.

Try this before you even think about a visit to the $$$$$ Mitsubishi Dealer:
Shift the 4WD lever between 4WD High, Low and 2WD at least 100 times. Often, this will free the mechanisms and resolve the problem. It worked for me after three years of trying everything else including the dealer replacing switches, etc. If this does fix it for you, just be sure to shift the vehicle in and out of 4WD several times at least one a week and this will keep the mechanisms lubricated and functioning correctly. If that doesn't work, try the above link (article). Good luck!

Jeff

Our 2001 mitsubishi montero xls ran hot and blew a head gasket.We just got it back and it rus great but has a little shimey or puttin when we are sitting at a light,as if it is idle to low.Put it in park and it runs smoother. Idle sensor or throttle sensor got damaged from the heat? Not sure...just thinking out loud! Any other suggestions?