2005 XC90: Left front brake locks up scary bad when I brake. replaced both front wheel speed sensors, calipers, brake pedal position sensor, and clockwork spring assembly, but it still locks up. Showing all kinds of codes even though I replaced the sensors. Should I try replacing the brake control m...

For about $115 you can buy an iCarsoft i906 code reader on Amazon that will let you check and reset all Volvo codes without going to the dealer. It has saved me hundreds of dollars in repair work by locating faults in sensors that can easily be replaced by a non-mechanic.

I am having exactly the same problem with my 2004 S80; intermittent misfire on cyl 3. Did you ever resolve the issue?