1995 850 Computer Codes

Discussion in 'Volvo 850' started by Jay Epstein, May 14, 2005.

  1. Jay Epstein

    Jay Epstein Guest

    Check Engine Light just came on in my 850. I get the all the following
    codes:

    A1: 124 Mode selector faulty or short circuit to ground

    A2: 241 EGR system flow faulty

    A3: 142 Faulty brake pedal switch, open or short
    213 Left rear wheel sensor, no signal on moving off
    214 Right rear wheel sensor, no signal on moving off
    424 Pressure switch for TRACS, faulty or short circuit
    (I already know my ABS is on the way out . . .)

    A6: nothing

    A7: 122, 113 (What are these)

    I gone through my Haynes, & following websites:
    http://seawinds.ws/volvo/check_engine.htm
    http://www.volvospeed.com/maintence.htm
    http://www.brickboard.com/AWD/search.htm
    The only one I'm really worried about is A2: 241 EGR system flow
    faulty. What is this? I've cleaned my throttle body & flame trap, what
    else? Possibly air mass meter or its connections? Also, I CAN'T clear
    the codes out, even following Haynes instructions, i.e. 5 seconds of
    holding down the button, I get nothing, not even 1-1-1. Any thoughts,
    suggestions, tips? Mike F, you've implied that there could be a short
    or bad circuitry in the diagnostics that would prevent clearing
    codes, yes?

    Thanks for any ideas.
    Jay
     
    Jay Epstein, May 14, 2005
    #1
  2. Jay Epstein

    Guest Guest

    is your winter mode lights blinking ? a1 124 denotes a short in the mode
    switch for the transmission..trans shifting ok ?
    speedo working ?
     
    Guest, May 14, 2005
    #2
  3. Jay Epstein

    Mike F Guest

    It's possible there can be a problem in the wires for the diagnostic
    plug that would prevent clearing codes, but I'd say it's very unlikely.
    I've seen this problem that was only cured by a new ECU, but that was on
    a 10 valve model with the Siemens system. Most often when someone can't
    clear a code, it's because they haven't just read it. The sequence has
    to be: Ignition on, read all codes, clear all codes. If you've turned
    the ignition off after reading the codes, then they won't clear. And of
    course there's always the "disconnect the battery for a while" method,
    just make sure you have your radio code.

    For your EGR flow fault code, try taking the EGR valve off the intake
    manifold and cleaning it.
    http://www.volvospeed.com/Repair/egr.php

    --
    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, May 16, 2005
    #3
  4. Jay Epstein

    Jay Epstein Guest

    Yes, transmission & speedo are fine. Everything runs great, but we've
    had cool, rainy weather, so I'm thinking corrosion on an electrical
    connection somewhere, but hardly know where to start with this litany
    of errors. Also, I just can't seem to clear codes . . .
    Thanks,
    Jay
     
    Jay Epstein, May 16, 2005
    #4
  5. Jay Epstein

    Jay Epstein Guest

    Thanks Mike !!!
    I'll get on it!
    Jay

     
    Jay Epstein, May 16, 2005
    #5
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