Secondary Air Tank Low Air Warning Sensor Problem

Discussion in 'Volvo Forum' started by Not2Bad, Feb 2, 2013.

  1. Not2Bad

    Not2Bad Bobtail Member

    1
    0
    Feb 2, 2013
    0
    Hi,

    I have a 2004 Volvo 630 With 565 ISX Engine. Recently I started to get low air warning from secondary air tank. the fact that the preassure read out drops to 0psi and than comes back to previous Preassure before the drop with in a second leads me to think that it may just be the sensor or wirring to the sensor. Where on my truck are these located? is it the ones under the tilt steering pedal on the firewall? if so which one? or do I have to start unpluging them till I come accross the second air tank sensor?


    any suggestions?

    PS My first post on here.


    thanks in advance
    Nik
     
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  3. terryt

    terryt Heavy Load Member

    722
    753
    Apr 27, 2009
    0
    these senors are just above the clutch pedal if you look outside on the firewall the black plastic pass through with the air lines hooked to it. Go to the inside of this unit are all the air pressure senors. not sure which one is the one you want but just do like you said start unplugging them till you find the one you need, these senors are quick connect just like the air lines. Hope this help.
     
  4. gregor

    gregor Light Load Member

    90
    19
    May 13, 2011
    chicago,il
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    something went wrong so im posting again, on older volvos secondary tank sensor is marked as BTD ,on newer or updated plate as i just did will be BTANK, make sure there is no cracks on your plate cuz its a common problem ...do everything carefully its esy to break
     
  5. Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,630
    Oct 11, 2010
    Borispol, Ukraine
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    check for ISX solenoids air leak, especially turbo
     
  6. gregor

    gregor Light Load Member

    90
    19
    May 13, 2011
    chicago,il
    0
    Pablo what are isx air solenoids?
     
  7. Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,630
    Oct 11, 2010
    Borispol, Ukraine
    0
    only on Volvo VGT air actuator is connected to secondary tank!
     
  8. grizzly transport

    grizzly transport Bobtail Member

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    Jan 2, 2019
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    Did you find the problem I am having the same issue
     
  9. Leskrol1

    Leskrol1 Bobtail Member

    3
    0
    May 25, 2019
    0
    Did you find the problem ?
    I have exactly the same.
    Thanx
    Les
     
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