1998 V70 AWD ABS rear speed sensors

Discussion in 'Volvo V70' started by tom_sawyer70, Jul 6, 2006.

  1. tom_sawyer70

    tom_sawyer70 Guest

    Following my trip to the mechanic for the intermittant stalling issue,
    the ABS light came on and they recommended replacing the two rear speed
    sensors. There was a considerable part and labor expense associated
    with the estimate to repair and in reading online, it seems to be that
    those sensors are typically replaced for such conditions but do not
    resolve the issue.

    The sensors themselves do not look complicated, but I have not found
    instructions on replacement. Are they hard to replace and/or in a
    difficult spot (the reason for the high labor estimate)?

    I've read where PnP switches, mass air meters and other components are
    more likely to be the real root cause. Could these be replaced (less
    expensively) as an interim step before attempting the speed sensors?

    TIA
     
    tom_sawyer70, Jul 6, 2006
    #1
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  2. tom_sawyer70

    John Horner Guest

    I wouldn't do it. The ABS controller fails on these cars with
    depressing regularity and the computer codes often point to failed
    sensors when in fact a trace inside the controller is what has really
    gone wrong. Mechanics do what the computer tells them and customers
    pay for sensor replacements, yet often the real failure has not been
    fixed.

    My guess is that your "mechanic" is clearly not a specialist in late
    model Volvos!

    This guy has fixed zillions of these controllers and has a good
    reputation in Volvo enthusiast circles. Check it out:

    http://home.earthlink.net/~vicrocha/

    John
     
    John Horner, Jul 6, 2006
    #2
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  3. tom_sawyer70

    tom_sawyer70 Guest

    John,
    Thanks for the post. I had read that site earlier, which is one of the
    reasons I had some questions whether or not to replace the sensors or
    look elsewhere.

    Dave
     
    tom_sawyer70, Jul 6, 2006
    #3
  4. tom_sawyer70

    Mike F Guest

    The sensors themselves are not hard to get at - the problem is that
    they're joined in a very long common harness that goes over the gas
    tank, that's what requires the time and costs the money. And the big
    joke (as others in this thread have mentioned) is that it'll be wasted
    money - 99.99% the problem is with the control unit.

    --
    Mike F.
    Thornhill (near Toronto), Ont.

    Replace tt with t (twice!) and remove parentheses to email me directly.
    (But I check the newsgroup more often than this email address.)
     
    Mike F, Jul 7, 2006
    #4
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