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  1. 10-24-2016 11:51 AM #1
    Moose88x
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    CEL for fuel pressure regulator

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    Anyone have this CEL yet? I'm stage 2+ APR and running Test pipes with APR'S test pipe tune. I cleared my DTC's maybe about 2 days ago and this popped up. Unsure if I should do an upgrade or just replace it with an OEM unit. I'm planning on running dual pulley with a CW piggy once I get my new pulley. Any input would be great. Thanks.

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  2. 10-24-2016 02:11 PM #2
    LittleDozer
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    Quote Originally Posted by Moose88x View Post
    Anyone have this CEL yet? I'm stage 2+ APR and running Test pipes with APR'S test pipe tune. I cleared my DTC's maybe about 2 days ago and this popped up. Unsure if I should do an upgrade or just replace it with an OEM unit. I'm planning on running dual pulley with a CW piggy once I get my new pulley. Any input would be great. Thanks.

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    What's the code


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  3. 10-24-2016 02:27 PM #3
    Lensch09
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    If it's low fuel pressure fault, I can all but garuntee that its your stock pump crapping out. There's been quite a bit of this going around lately for those of us with B8.5s.

    -DL
    2022 RS5 Sportback - Navarra Blue

    Previously:
    2016 Audi S4 Prestige with tons of boltons -Build Thread - http://www.audizine.com/forum/showth...016-S4-Ordered!
    2007 Audi A4 S-line Ti APR GT2871R
    1999 Audi A4 Avant (S4 replica)
    2000 Audi S4 Sedan (Stage III)
    1999.5 Audi A4 1.8TQM Sport (bolt-ons)
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  4. 10-24-2016 02:54 PM #4
    Moose88x
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    P0090 is the code. Which is the CEL for fuel pressure regulator.

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  5. 10-24-2016 03:29 PM #5
    Lensch09
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    Maybe not the pump then.

    This is what you will see for LPFP failure



    -DL
    2022 RS5 Sportback - Navarra Blue

    Previously:
    2016 Audi S4 Prestige with tons of boltons -Build Thread - http://www.audizine.com/forum/showth...016-S4-Ordered!
    2007 Audi A4 S-line Ti APR GT2871R
    1999 Audi A4 Avant (S4 replica)
    2000 Audi S4 Sedan (Stage III)
    1999.5 Audi A4 1.8TQM Sport (bolt-ons)
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  6. 10-24-2016 04:21 PM #6
    LittleDozer
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    Quote Originally Posted by Moose88x View Post
    P0090 is the code. Which is the CEL for fuel pressure regulator.

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    Are you pulling through Vag Com or a random OBD scanner? P0090 I believe is the generic OBD code for P310B in Audi.

    If so, it's your low pressure pump.


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  7. 10-24-2016 04:42 PM #7
    Moose88x
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    Quote Originally Posted by LittleDozer View Post
    Are you pulling through Vag Com or a random OBD scanner? P0090 I believe is the generic OBD code for P310B in Audi.

    If so, it's your low pressure pump.


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    OBD reader I haven't ordered a VAGCOM yet

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  8. 10-24-2016 05:02 PM #8
    Moose88x
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    Quote Originally Posted by Lensch09 View Post
    Maybe not the pump then.

    This is what you will see for LPFP failure



    -DL
    Still could be that idk. I need to order a VAGCOM or borrow my buddies to check for sure.

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  9. 10-24-2016 05:47 PM #9
    LittleDozer
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    Quote Originally Posted by Lensch09 View Post
    Maybe not the pump then.

    This is what you will see for LPFP failure



    -DL
    P0090 is the generic OBD code


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  10. 06-23-2017 09:35 AM #10
    juniorcruzer
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    Hate to bring back an old thread, but have a buddy that is having this issue. Did you ever figure out what it was?

    Jon
    2010 S4 3.0T, chipwerks stage I
    2010 A6 3.0T, APR Stage 2+, Roc Euro Intake, VMR V710 18x9.5 HyperSilver, 30% tint, A3 clear marker lights, LED Reverse lights, RS6 Grill
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  12. 06-23-2017 11:12 AM #11
    Moose88x
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    Quote Originally Posted by juniorcruzer View Post
    Hate to bring back an old thread, but have a buddy that is having this issue. Did you ever figure out what it was?

    Jon
    Ended up being the LPFP in the tank and fuel filter.


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