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Old 11-12-2017, 01:15 PM   #1
Join Date: Oct 2017
Location: Denver, Co.
Default Possible ABS module failure?

Occasionally while driving, and sometimes on startup, my odometer and trip read ----.-/------, my speedometer drops to zero and my brake and ABS lights turn on.
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Old 11-16-2017, 11:36 AM   #2
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Join Date: Sep 2005

please mention the model and year of production. It increases your chance of getting a useful answer.
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Old 11-16-2017, 11:40 AM   #3
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Join Date: May 2004
Location: St. Louis

If it's the V70XC, I'd have no idea. If it's a late model RWD 240/740/940, then it's likely the speed sensor in the rear axle, that runs both the speedo/odo and one of the 3 circuits in the ABS system. Bad sensors on the diff cover, or bad wiring to it, would give you those symptoms.
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Old 11-18-2017, 10:30 PM   #4
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Join Date: Jun 2003
Location: Midwest - IL

TRACS module issues are very common in P80 Volvo's. Easiest option is to buy a rebuilt unit. Hardest option is to cut open your existing box and reflow the solder. You'll have to seal the box up watertight if you go that route.
2009 XC70 T6
2011 XC90 R-design
1998 V70 AWD
1966 M-B 230
2006 V70R GT
2011 C30 T5M
2006 XC70
1997 850 T5
1988 760 Turbo
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Old 11-29-2017, 03:25 PM   #5
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Join Date: Dec 2016
Location: Chicagoland

Sounds like this is a p80. The ABS module is easily replaced with a junkyard module or one from ebay. Make sure you get the correct one for yourself (TRAC, ect).

An ABS sensor problem on each wheel can mimic this also.
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