Volvo VNL 630 D16 code P04D9

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Majid199, Mar 4, 2022.

  1. Majid199

    Majid199 Bobtail Member

    3
    0
    Jan 16, 2021
    0
    Hello
    I have this code now for a month after buying this truck. The DPF is deleted by the previous owner. I looked online for the code it shows
    P04D900: Closed Leop EGR Control At Limit - Flow Too Low, No Sub
    I’m sure if I need to change the EGR VALVE or EGR temperature sensor or clean the EGR COOLER
    please advise if you have any solutions
    Thank you
     
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