No regen over the road

Discussion in 'Volvo Forum' started by satwant, Nov 28, 2021.

  1. satwant

    satwant Bobtail Member

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    Jan 13, 2021
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    Hi guys
    I have a 2021 VNL 860 with a volvo motor auto transmission. It has 150k miles on it. I wanted to know whether these new trucks do regen over the road ? Because mine does not or if it does there is no message on the display like my old 2014 volvo. The display says regen not required when I tried a parked regen.
    Second issue is I hear an actual sharp whistling sound under the hood when I speed up. Only lasts for a few seconds. Coincidence is the turbo boost reads around 10-20 when it happenes. Is it turbo or belts ?
     
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  3. flood

    flood Road Train Member

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    Dec 25, 2010
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    If it's doing a rolling regen right you'll get no lights....

    The only time you'll get a light (high exhaust temp) is if you stop when it's doing it...
     
    86scotty and AModelCat Thank this.
  4. RustyRod

    RustyRod Bobtail Member

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    Feb 14, 2021
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    18 and newer trucks got really good at it. You can't even see/feel a regen while you are driving. If you stop the engine and fire back up later, it will start again 'till finish.
     
    Knucklehead Thanks this.
  5. Ross_Tech

    Ross_Tech Light Load Member

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    Aug 31, 2021
    Michigan
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    I had one a few weeks ago with a sharp whistle under boost. It was a misaligned clamp at the CAC inlet. A new o-ring and clamp fixed it. Check all your inlet hoses and clamps. It may be hard to find without a smoke machine or pressure testing the intake and using soap and water. It's hard to create that kind of boost while stationary.
     
  6. nasriza

    nasriza Road Train Member

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    Feb 1, 2013
    Chicago, IL
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    the whistle noise most likely is a boost leak as far as regen goes with newer truck nothing to worry about unless they start asking for it constantly with all the passive regens going on now days should not be an issue.
     
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