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  1. #1
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    DPF light followed by emission control system light

    The dpf light on my 2009 A4 2.0 tdi CR170 has been on and off for the last couple of weeks. This was followed today by the emission control system light which is on continuously. I'm assuming these two are related?

    The car is driving fine by the way. Anyone any other ideas or do I need to get the error codes pulled first?

    Cheers

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  3. #2
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    basically its warning you the dpf is full . or it could be the pressure sensor on the dpf gone faulty .

    get the error codes and get them to check the ash mass of the dpf .

  4. #3
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    Where are you based, i may be able able to check and regenerate it if your driving style doesnt allow it to.
    '02 TDi 130 Sport: Mods to date: BXP 160 conversion, EGR delete, Decat, Helix SMF fast road clutch, 312mm front rotors, full DIS , CC, Xenons.
    VCDS fully registered and happy to help.
    *Need a Spare Key or Remote? SKC retrieval? Clock/ECU swap or milage correction? I am fully insured to work on your vehicle! Offering a good deal and quality service to ASN members Nationwide!*

  5. #4
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    Quote Originally Posted by hollow View Post
    basically its warning you the dpf is full . or it could be the pressure sensor on the dpf gone faulty .

    get the error codes and get them to check the ash mass of the dpf .
    Cheers fella. Will get the codes pulled as soon as I can. Getting married at the weekend so probably won't get a chance till next week. If I leave it will it eventually go into limp mode? As I've already decided I'll be getting the dpf deleted and the car mapped

  6. #5
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    Quote Originally Posted by @udi A3 View Post
    Where are you based, i may be able able to check and regenerate it if your driving style doesnt allow it to.
    I'm in Sunderland

  7. #6
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    next stage if dpf is full is limp mode when you try to boot it, as it doesnt look like its doing a regen .
    All the best for your wedding day ,congrats to you + your future wife

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    Quote Originally Posted by hollow View Post
    next stage if dpf is full is limp mode when you try to boot it, as it doesnt look like its doing a regen .
    All the best for your wedding day ,congrats to you + your future wife
    Thanks fella, that's very much appreciated

    Ok, will take it for a another spin and try and force a regen tomorrow. If it goes into limp mode, how driveable will it be? Is it simply a case of not being able to generate any boost or does it limit revs? Wouldn't normally be a problem but I'm short on free time at the minute lol

  9. #8
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    Limp mode will reduce turbo pressure and revlimit in everygear at 3000rpm.

    a dpf delete and remap is what you need.

  10. #9
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    Thought as much, the emission control light has gone off today but I suspect it'll make a reappearance lol.

  11. #10
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    as per pm happy to plug u in and check soot levels on route to the meet oop north :D
    '02 TDi 130 Sport: Mods to date: BXP 160 conversion, EGR delete, Decat, Helix SMF fast road clutch, 312mm front rotors, full DIS , CC, Xenons.
    VCDS fully registered and happy to help.
    *Need a Spare Key or Remote? SKC retrieval? Clock/ECU swap or milage correction? I am fully insured to work on your vehicle! Offering a good deal and quality service to ASN members Nationwide!*

  12. #11
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    Quote Originally Posted by @udi A3 View Post
    as per pm happy to plug u in and check soot levels on route to the meet oop north :D
    Yep definitely fella, it's much appreciated

  13. #12
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    Mine was exactly same. Turned out to be the sensor. £85 fitted at Vastech in Northallerton.

  14. #13
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    Please don't laugh. But have you tried
    3rd gear
    3000 rpm
    3 miles

  15. #14
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    I tried 4000 rpm for 20 miles, did not cure it. Then I plugged in and it all became clear.....

  16. #15
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    What was the outcome ?

  17. #16
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    Quote Originally Posted by Zafi View Post
    I tried 4000 rpm for 20 miles, did not cure it. Then I plugged in and it all became clear.....
    try read it again 3 is the key number

  18. #17
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    Quote Originally Posted by helal786 View Post
    What was the outcome ?
    this
    Quote Originally Posted by Zafi View Post
    Mine was exactly same. Turned out to be the sensor. £85 fitted at Vastech in Northallerton.

  19. #18
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    Sorry lads just got back off my hols so haven't looked at the thread in a while. Error light is still on the dash and the car is still driving fine. Tried driving 20 odd miles at high rpm with no joy.

    Car will hopefully be getting the fault codes pulled on Saturday

  20. #19
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    Update

    Tom (@udi A3) very kindly plugged the car in tonight. Turns out the DPF is fine and a sensor has gone.

    5253 - Diesel Particle Filter; Differential Pressure Sensor
    P2452 00 [039] - Elect. Malfunction
    Not Confirmed - Tested Since Memory Clear

    So it looks like it's going to a cheap fix

 

 

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