SCR SYSTEM FAULT

Discussion in 'Volvo Forum' started by AlexD13, Aug 6, 2016.

  1. AlexD13

    AlexD13 Light Load Member

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    Hello Everyone, I am stuck in Phoenix.. Dash shows, SCR System Fault, Engine will Derate in <60 mins.. please help me.. Dealer says they cant take me in til Monday.
     
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  3. WitchingHour

    WitchingHour Road Train Member

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    Could be a number of things... NOX sensors could be reading insufficient catalyst conversion efficiency - which could be as simple as replacing the air filter up to requiring the SCR to be replaced. DEF doser could need service, or some component of the DEF system (such as a heater hose) could be faulty. Could be a problem with the DPF... the dash messages are just there to let you know something is amiss... they don't really do anything to diagnose it further, such as give you PID/SID. Maybe try to find another repair shop is about all there is to suggest.
     
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  4. CoyoteExpress

    CoyoteExpress Medium Load Member

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    Did the def gauge works ????
     
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  5. AlexD13

    AlexD13 Light Load Member

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    Yeah, it was showing half.. Little over half. I just got the truck towed to the dealer. They said it will be til Monday night til they check it out. Im just annoyed. Already paid $5100 for a new turbo this week
     
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  6. CoyoteExpress

    CoyoteExpress Medium Load Member

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  7. AlexD13

    AlexD13 Light Load Member

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    Jun 13, 2016
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    Not sure, my Driver is figuring it out . But the derate mode was on. Wich sucks because I had no time to drive to dealer. Hopefully it isnt something huge
     
  8. WitchingHour

    WitchingHour Road Train Member

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    You won't get a fault code off the dash. Unfortunately, you're kinda at the mercy of the dealership until they can plug in and get the codes.
     
  9. AlexD13

    AlexD13 Light Load Member

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    Ya i figured, They said they will look at it Monday evening so Im renting a car to go back home to La.
     
  10. CoyoteExpress

    CoyoteExpress Medium Load Member

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    Unplug the speed sensor at the end of tranny so the timer stop normal and its possible to roll to the shop.
     
  11. WitchingHour

    WitchingHour Road Train Member

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    Investing in a ProLink might not be a bad idea. It's not the same as having the proprietary software, but it can give you the PID/SID and perform some command functions across a range of vehicles.
     
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