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D3 - Common Faults Quick links to all known common faults and their solutions

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Old 26th March 2014, 07:51 PM
Claymore Claymore is offline
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Location: Northern Ireland
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Default Help please.. engine limp mode..

Hi guys..
Any suggestions on the following would be graciously accepted..

Under hard acceleration my 3.0TDI is going into limp mode..
A typical example is pulling away from a roundabout with boot down hard, but not excessive RPM, or pushing on to overtake.
First thing I know that anything is wrong is the preheater plug flashing on the dash.. Not getting any other messages, no fault codes showing that appear related, and switching engine off and on again resets everything and back to normal..

I do however have my engine warning lamp on due to ongoing problem with bank 1 inlet manifold. Any ideas if the two could be related? Maybe something to do with the airflow control through the flaps? This has only started recently, but the manifold problem has been there since Nov/Dec.

Anybody seen theis before??

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Old 26th March 2014, 08:30 PM
PsYcHe PsYcHe is offline
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Could well be related... May also be DPFs.
2010 Jag XF 3.0D Portfolio S

I know.. I know..

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Old 27th March 2014, 05:24 AM
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Somerandomguy Somerandomguy is offline
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Location: Kent
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Default Turbo related maybe

I had the same symptoms when i had a split pipe in the air cooler circuit from the turbo.

When putting my foot down or with a full load on board it would flash the light, then go solid. A restart cleared it.

But I did get an error code that boost pressure was too low, so I would double check for fault codes, it could easily be related to the fault on the inlet manifold as I would expect the faults would have a similar effect on the engine.

2004 A8 3.0 TDI Sport Brilliant Black
Came with: Black Valcona/Alcantara Leather, KESSY, rear blind, flappy paddle gear change, Phone Prep, TV
Added:Bluetooth, AMI, Hybrid TV, Parking plus, Ski hatch, towbar, DAB, Umbrella Holder, Reversing camera, Auto lights, Wheel refurb
Things to fix: Turbo fault, power drain
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Old 27th March 2014, 07:56 PM
snapdragon snapdragon is offline
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There MUST be some fault codes stored - what did you read them with?
Don't bother with a generic ODBII reader as not all possible VAG fault codes are covered by the scope of the OBDII standard.

Last edited by snapdragon; 27th March 2014 at 07:59 PM.
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Old 27th March 2014, 09:16 PM
Claymore Claymore is offline
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Thanks guys.
To be honest it was on a pretty standard OBD reader that I borrowed.
I'll get it re-done with something a bit more "capable"
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Old 10th April 2014, 07:29 AM
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roberto roberto is offline
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Default turbo veins blocked

the first thing i would do is take off the turbo and strip and clean the variable veins
i did my vw sharan it was mega dirty, cleaned and refitted it was perfect
Looking for the Holy Grail Audi ..
2010 A6-C6 3.0tdi LeMans Quattro (my daily) ..
2013 Caravelle 140 DSG (family outings) ..
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