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Discussion Starter #1
2009 P308 SW 1.6 HDI with FAP 110 BHP.

Generally running very well,except for recent dire Anti-Pollution warning and a P0104 code.
Using a Launch Creader I have reset the eml,but the fault,described as intermittent,keeps returning.
I have checked the wiring security and the plug,all of which appear tickety-boo.
I guess my real question is whether my 168,000 Km MAF sensor has actually started to break down electrically,and instead of repeatedly attempting to isolate ghost faults,should I simply replace the unit ?
 

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Just got a new one in the letterbox this morning....all the way from sunny Leyland,Lancs. I have the car just over two years now,and the previous owner has no recollection of it being changed. So I'll wait for the next triggering and then swap it out.....I have a notion that it could be the Turbo variable vanes being a bit sticky as being the root cause...would that sound plausible ?
 

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Just a quick update to this saga....Fitted the replacement MAF this morning,and immediately noticed a lumpy tickover,went shopping and it drove like a bad tempered sow.....No codes being registered,but definitely not driveable. The P1014 code originally presented after a main road run,when returning to tickover at the garden gate. EML remained on but general performance fine...So !....now I have disconnected the MAF plug and went for a short drive,and it drives fine,with NO EML showing..I'm toying with refitting the original MAF and seeing if there's spmething else that is causing the fault light to show ?...Any thoughts ??
 

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Last post of the day !!...I decided to drown the original MAF in Electric Contact Cleaner,refit it and reconnect the plug and voila...no EML and plenty of boost...whilst mucking around I took some pics of the turbo area..I'm thinking the turbo does'nt spin as easily as it should,but maybe I'm chasing shadows ?
 

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WElll.....after a week without P0104....it has returned...Grrrrrr....slowing down approaching a roundabout and click !! On comes the light....Not to be outdone,I've reset the EML and disconnected the MAF plug...and once again I am in the clear...so what exactly are the benefits of the MAF in the first place ?
 

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I have this issue with my wife’s vw had various faults all linked to maf sensors

I didn’t buy any new ones but eventually cleaned out the throttle body for some odd reason and since then over 6 months no light on and lumpy Tickover is much reduced

The throttle body in your engine is normally plastic but who knows

The unplugging of the maf sensor resets it to a standard map and turns a lot of other things off ie egr valve so it’s a slam dunk its the maf sensor


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Would it were that simple Monty...but mine's a 1.6 Diesel,with more 'stuff; plugged and clamped to the engine than a nuclear power station merits...the P0104 message is back,but since the car is going like a rocket,I'll stick a bit of black tape over the eml telltale.... :(
 

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I’m aware I’ve had 4 cars with the same engine

What I was getting at is sometimes another fault is linked and it’s not the maf sensor at all


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My thoughts also...I'm leaning towards the Variable vanes in the turbo sticking....but that's a bit of a job for kerbside I feel :(
 

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Based on those picture something has been getting into the turbo as there appears to be light abrasion damage to the turbo blades edges. Are you sure you have no split pipes or similar letting unfiltered air in

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