AdvTrac light remains on all the time and "check AdvTrac" message
The battery died in our 2005 Ford Explorer. When we replaced the battery, the AdvTrac light is always on in the instrument panel and "check AdvTrac" message beeps and shows up each time the car is started.
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The first thing to do is to have the ABS and engine computers scanned for trouble codes. The problem with the check engine light could also turn on the ABS and traction control lights. Or it could be different issues. The gas gauge being out of calibration could be the float in the gas tank or the gauge on the dash. I doubt that problem is related to the warning lights.
You may have a bad wheel bearing--do you hear a growing noise that gets louder with speed? The wheel sensors on your wheels are sensitive to excess motion between the wheel hub and the wheel, as they have a small gap between the sensor and the tone ring on the axle. The speed sonsors are used by both the ABS and the traction control systems on your truck. You can check your bearings for failure by jacking up the car and trying to shake the wheel. If the wheel doesn't have noticeable play, the bearing may still be bad enough to cause the sensor to misread the speed. If you're not sure, have your mechanic check the wheel bearings. If you have more questions, please let us know.
Do an ECU drain first. ie disconnect battery for 30 secs. foot the brake and reattached battery thereafter. If battery check light appeared again, disconnect battery while engine is on. If engine dies, you have an alternator problem - replace it. If engine remains on, you have a voltage regulator problem.
If battery check light disappeared, ECU drain resets sensors thus fixed your problem.
It means you have a fault in your vehicles antilock brake system. Having the light on will disable the abs system. Antilock/traction control keeps your wheels from locking up and provides you with a more controlled stop, such as in rain or snow. Take it in to a repair facility and have them scan the abs system for fault codes codes