low air warning from rear tank

Discussion in 'Volvo Forum' started by jlawall, Jun 29, 2021.

  1. jlawall

    jlawall Light Load Member

    59
    9
    Jan 29, 2011
    wapwallopen pa
    0
    Good afternoon
    I'm getting a low air warning buzzer and light on my 2004 VNL 670. the forward air tank reads reliably between 105 and 125, but my rear tank gauge drops suddenly to between 30-45 psi. It eventually shoots back to normal reading around 120 at which point buzzer stops and STOP! warning light shuts off. These changes are happening to quickly for the air pressure to have actually changed in the tank, so I'm thinking there is a defective sensor involved, possibly at the air manifold near the transmission? Any one have this experience?
     
    Bean Jr. Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Neilwhayes

    Neilwhayes Bobtail Member

    26
    18
    Jul 8, 2014
    miramichi nb. canada
    0
    I have had the exact issue on my 07. it was simply a connector coming loose at the rear of the instrument cluster.
     
    Bean Jr. and jlawall Thank this.
  4. jlawall

    jlawall Light Load Member

    59
    9
    Jan 29, 2011
    wapwallopen pa
    0
    Hmm. Makes scense to me. Never got into the instrument cluster before but will give it a shot.
    Thanks!
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted