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DPF light followed by emission control system light

Discussion in 'Audi S4/A4/A4 Cab (B8 Chassis)' started by StuF, Sep 9, 2013.

  1. StuF
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    StuF Member

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    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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  2. hollow
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    hollow Active Member

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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 .
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  3. @udi A3
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    @udi A3 Site Sponsor Site Sponsor

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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.
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  4. StuF
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    StuF Member

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    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
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  5. StuF
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    StuF Member

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    I'm in Sunderland
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  6. hollow
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    hollow Active Member

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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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  7. StuF
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    StuF Member

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    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
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  8. NVM
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    NVM New Member

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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.
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  9. StuF
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    StuF Member

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    Thought as much, the emission control light has gone off today but I suspect it'll make a reappearance lol.
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  10. @udi A3
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    @udi A3 Site Sponsor Site Sponsor

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    as per pm happy to plug u in and check soot levels on route to the meet oop north :D
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  11. StuF
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    StuF Member

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    Yep definitely fella, it's much appreciated :)
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  12. Zafi
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    Zafi Active Member

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    Mine was exactly same. Turned out to be the sensor. £85 fitted at Vastech in Northallerton.
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  13. AudiMrG
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    AudiMrG New Member

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    Please don't laugh. But have you tried
    3rd gear
    3000 rpm
    3 miles
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  14. Zafi
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    Zafi Active Member

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    I tried 4000 rpm for 20 miles, did not cure it. Then I plugged in and it all became clear.....
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  15. helal786
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    helal786 New Member

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    What was the outcome ?
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  16. AudiMrG
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    AudiMrG New Member

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    try read it again 3 is the key number
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  17. Zafi
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    Zafi Active Member

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    this
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  18. StuF
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    StuF Member

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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 ;)
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  19. StuF
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    StuF Member

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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 :)
    #19

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