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Discussion Starter #1
Hi
I have 2.0TDI 2008 the dpf light is on but went out after a long run (120 miles) but back on after sitting in traffic. It stayed off for 100 miles on the motorway?
I see the glow plug coil goes out but starts flashing after 30MPH.
The engine management light is on permanently the code is 2279.
Also car hard to start cold you need to keep the revs up?
Love the car but not sure where to start to fix?
Regards
Nether7
 

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Dpf problem could be that but you should start with simpler things. A diagnostic code on its own isn't much help, although that code refers to an air intake leak? :confused:

If you have decent diagnostics it should tell you which glow plug if any may be faulty? That's the simplest fault to start with. If a glow plug(s) is dead, change all 4 and that should improve cold starting. However, VW use the glow plug light for emissions system related faults, therefore check and eliminate the glow plugs first.

With most emission faults involving the DPF, the ECU may eventually put your car into 'limp home' mode if you keep driving it.:eek:

Decent diagnostics can inform on various sensor measurements around the dpf, including soot and ash loading. If you don't have comprehensive diagnostics tools, you will not get detailed information, or may get misleading information if there is more than one simple fault. :confused:
 

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Discussion Starter #3
Thanks

1. What does the DPF light going off on a long run and back in traffic indicate.
2. What are the possible causes and fixes for the 2279 code

Rgds

Nether7
 

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Your fault scenarios suggest more than one fault which may or may not be related to each other? There is no single quick fix answer without more detailed diagnostics information. The best advice is you check your glowplugs first, then afterwards come back with a full diagnostics scan reporting all the fault codes and their meaning. If you can't do that for yourself, the other steps are harder, more complex and best left to a good mechanic to work through.

Decent diagnostics can inform on various sensor measurements around the dpf, including soot and ash loading. If you don't have comprehensive diagnostics tools, you will not get detailed information, or may get misleading information if there is more than one simple fault.
 

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The code 2279 is a bit vague. A brief googling shows it could be P2279, "leak in air intake system" - which doesn't tell you much, because it's a generic OBD code and not a VW code. What it does tell you, though, is that you could get more information by using a VW-specific scan tool.

If you have an Android smartphone, get yourself an OBDeleven dongle - it'll tell you a lot more than whatever gave you the 2279 code.
 
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