TRACS light & ABS light on together means you need an ABS module, about $400 retail, plus they are hard to access in Turbo model 850, so labor is a factor. I've been looking at those two lights blink on for weeks; braking is now partly affected. On occasion pedal gets "hard" and car doesn't stop as expected.
Changing module this week, wil report result.
Also, I moved my horns and added K&N; throttle response improved over a clean paper (non-Volvo) filter. Benefit is when you wash and oil your dirty filter your car gets a little"jump"!!
Also try Bosch Plus4 platinum plugs, I pay about $20 bucks a set...don't pay 8.50 each...
96 855R Flam-Rod
Supersprint, Bilsteins, H&R, Brembo, K&N, Yokohama, E-Code headlights
Spoiler (SAM) coming soon!!