My 2005 mountaineer Advtrac, ABS AWD and O/D Off flashes when im driving and no one can tell me what is wrong with it.

anytime the suspension system needs to be repaired, its crucial that a wheel alignment is done. because the computer is so precise in its measurements of wheel speed; which facilitate systems like abs/traction control, even the slightest value being out of spec could and most likely will result in failure of these systems. get an alignment. hope this helps!

possible a loose front wheel bearing or a failed front wheel bearing
the abs light sensor is probably touching the rotor
tack it back to the shop that did the job as there is a problem in the assembly of the unit.

It means you are driving in All Wheel Drive mode (not recommended for driving on regular roads, so turn it OFF), and that the Anti-lock Brake System module has likely failed (possibly because you were driving around on regular roads with All Wheel Drive turned on).

either one of the wheel sensors is out of adjustment or the brakes are worn to replacement thickness.. check and replace if necessary..

Generally not, you will hear a low rumbling vibrational sound when you are driving. Sometimes when you accelerate your wheel will feel like it is moving up and down.
If your ABS and AWD lock lights come on, you need to get your vehicle looked at and diagnosed.

check your tire pressure that can cause the track light to come on and on the abs the sensor can have oil and dirt on it

You need to go to a repair facility

Have the vehicle scanned for codes

Diagnosed,and Repair the System
Malfunction. (ABS)

Don't need a Dealer

Bring the vehicle into a repair shop ASAP. There are several things that can be wrong such as calipers master cylinder, module,fluid exhaust valves . ABS problems will affect AWD. So in all likelyhood once ABS problem is cleared AWD will be fine.

Disconnect the battery and try to reset the system to default. It may be a PCM issue.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_4c166ba81493f541

The abs sensors also control the traction control and 4 wheel drive actuators so if one of the sensors is faulty the traction control will be disabled and the drive system will be stuck in the mode set at time of failure be that 4x4 or 2wd
get the abs system repaired