We have a 1995 Volvo 850 turbo sedan (222 hp, ~170k miles, bought it new). When I start it in the morning or after a long parking time (i.e., more than 7-8 hours long) the ABS and Tracs lights come on (and stay on); the ABS first and a few moments later the Tracs one. When I start our car after having it parked for, say, less than 3-4 hours, none of the ABS+Tracs lights ever comes on (and they stay off). This pattern started a few days ago. The only ABS code I get is 444 (i.e., no power supply to hydraulic modulator valves). Any suggestions on what may be happening and/or what to try next?
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