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Is my abs pump finally failing?

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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funbuffalo24
Posts: 50
Joined: 21 June 2009
Year and Model: 2000 V70 XC
Location: Buffalo, NY

Is my abs pump finally failing?

Post by funbuffalo24 »

Last week, I replaced my left front caliper and brake hose, as my caliper had frozen, and I figured it was time to change the 13yo brake line just in case as well. This week however, as I'm driving I get this horrid groaning noise I can only assume is from the abs pump, and on occasion, when I brake, it feels as though there is gravel or something halfway through my braking application; almost as if the abs is kinda starting up, then fights, then gives up. I've had no MIL lights come on, and nothing seems amiss other than that, and I can't pull any codes. The car still brakes well. But reading around on here it seems like others have experienced similar issues due to the abs unit, but with accompanying failure lights going off. I've gone in and checked my tone wheels and speed sensors, no problems there either. Am I on the right track in assuming that my abs unit might finally be giving up the ghost? Should I look somewhere else?

JRL
Posts: 9350
Joined: 22 November 2005
Year and Model: Several
Location: 19333
Been thanked: 16 times

Post by JRL »

You may have messed up the (ABS) wheel sensor when you did the caliper, I would check there first
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

funbuffalo24
Posts: 50
Joined: 21 June 2009
Year and Model: 2000 V70 XC
Location: Buffalo, NY

Post by funbuffalo24 »

sounds good. I'll check back when I can see, and get back to you guys tomorrow.

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