Have 2006 rav 4. Abs, brake, vsc and tr ac lights all come on at once. They always go off after a bit of driving... All fluid levels are good.... Very wet and snowy here

SOURCE: ABS brakes

Your ABS sensor in the front left wheel is bad, this may also meen your wheel bearing is gone. Jack up that side and put you hands on the top and bottom of tire then shake it. if the tire moves alot you need to replace the wheel bearing.

SOURCE: ABS, Brake, and service 4wd warnings all came on

Lift up your front end, remove the tires, and spin your hub assembly. If it grinds, and doesn't spin very easily, it's a bearing. Bad bearings on chevy trucks are notorious for alerting every sensor in the front end. Start there. It can even falsely trigger your ABS to activate when it's not needed, causing your brakes not to work, and you could crash into something. I speak from experience.

SOURCE: when i started my 2006 rav 4 this morning these

If you had your foot on the brake while starting brake light could come on. If a catalytic convertor does not pass at startup (possibly ox sensor or whole convertor) then the computor turns 4wd vsc and check engine light on. note the six cylinder has three catalytic convertors and the four cylinder has two. Very expensive if convertor(s)

SOURCE: I have a 2006

I had this same problem - took it to the dealer several times to correct. The technician finally was able to identify the problem - the oxygen sensor (FP Number 89465-0R030). It's been almost a year and no problem since.

SOURCE: the VCS and Abs Indicator

If the lights went back off it means that the systems were activated due to road conditions, did their job, and then returned to their normal standby mode. If the lights remain on you need to have the vehicle's OBD computer read for trouble codes and then determine if any repairs are necessary. You can have the codes read at your dealer, your qualified mechanic, or at many auto parts stores.