Is the module and the sensors hard to replace? Are they real expencive?

Hello Everyone, I have the tracs/abs light on. Iv had a mechanic look at it and he cant find any thing wrong with it. Hes cleared the codes but the lights come back on. If I make a right turn a certain way the lights will go off until I hit a bump hard enough for there return. Latley ive heard what ...

Good afternoon, Im a new guy here and to Volvos. My GF just got a 850 and the brake lights quit on her, I replaced the switch at the pedal and saw another switch above it that has what looks like air tube coming from it. I looked in the book and didn't see anything about it. Does it work with the ...