Dreaded S3 tfsi P2188 Bank 1 to rich at idle urgent help ??

Currently have a dreaded fault with my Audi s3 tfsi 2010, P2188 code bank 1 to rich at idle, I have read on here about this being discussed previously but I am running short of answer’s now, the car is absolutely killing fuel off for fun, 40 miles range to a quarter of a tank of fuel driving sensible, many parts replaced and still can’t get to the bottom of the fault, had two different Audi tech’s look at it who is also scratching there heads with it aswell as it’s showing no symptoms with drivability of the car other than this dreaded code but them em pointing towards this then that then the other and not diagnosing the fault, Bank 1 to rich at idle P2188 I’m just chucking money at it chasing this dreaded fault as there are no symptoms with the drivability of the car, It doesn’t idle unsteady at all on tickover, there’s no misfires, it starts on point wiv turn of the key without hesitation, it still pulls and boosts fine with no lack in noticeable performance issues, other than the oil stinks of fuel when u open the oil cap although no signs to have risen on the dipstick to confirm which is strange considering the amount of fuel it’s dumping or going somewhere, here’s what’s been replaced so far parts wise,

New plugs
New air filter
Oil and filter change (only lasted 3 days after code being reset to detect oil contaminated with fuel again on Odis wtf)
lambda upper one back of engine
Maf sensor
Air inlet temp sensor
Crankcase Pcv valve
N80 valve
Charcoal canister
Cam follower and second hand pump aswell thinking the internal seal on HPFP may be leaking and contaminating the oil,

The only thing not been done is the injectors tested which I don’t really wanna chuck more and more money at it to find it’s not that at fault and it’s some daft sensor or a dreaded electrical gremlin problem, I’m really starting to loose patience with this car now as no one can put there finger on the issue!! Any help or recommendations Guys on this would greatly be appreciated.

Other than burn it ‍

Thanks for your reply, I Did speak to them last week who tried to advise a fuel pump and follower replace over the phone to see if that helped once I explained the symptoms I’m having and parts that’s been replaced, only issue with R tech is they are 2 and half hours from me in Manchester and they would need the car leaving with them so is gonna create a bit of a problem all round trip as it not the case of just driving and waiting with it, The car is standard and never been messed with to my knowledge other than cat back milltek on it, people keep sayin orrr injectors or its defo been mapped badly wtf. Had it in for diagnostic at 3 different garages who can’t locate the fault, last one recommended having injectors tested, not sure how involved with diagnostic they went other than plugging it in and having a look for a vac leak and keep saying or it’s this, then that might be at fault, I’m loosing the will to live with this car at the minute with this fault, Any other help or suggestions on this ?

ch1z64 said:

Check your hpfp that the O" ring is there and check behind the brass piece that the stainless steel union fits onto to see you have a little washer in there , as i am losing fuel too and i suspect it could be pump without washer my pump is for a CDLA engine so your 1 could be different as i have tried to get to the bottom off the washer piece to see if it is in all HPFP pumps

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Hi yeah I replaced the o ring seal when I fitted the second hand pump with a new one to be safe and also there was no washer that sits there either, mines a CDLA engine aswell, The stealers mentioned summot about that washer when I priced up the follower with them which id never heard of, ended up buying the kit with new o ring, follower and 3 new bolts, was told it’s the internal seal that can fail on the HPFP which can cause this issue, but you have to replace full HPFP to rectify as internal seal can’t be replaced on its own.

Daveyonthemove said:

Are you able to locate someone locally who could plug in CVDS and log the fuel readings across all 4 cylinders?
This would at least give an idea of how they are behaving and maybe pinpoint the issue easier.

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Thanks for response, I honestly thought the two or three techs that have looked at this would of done this to be fair, but I’m unsure, I have had all the plugs out and cranked it over a few time to see if a injector might be stuck open but nothing seem a miss really to the eye, I have Just managed to borrow my mates Odis diagnostics software but unsure how to use it really to log Readings other than to read and clear the DTC’s any ideas ?

abmat said:

My money is on injectors. One or a few are failing and are dumping too much fuel in.

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Why would there be no noticeable issues with the drivability and performance if this was the case ? surely it would run like crap wouldn’t it with symptoms other than just fuel economy and DTC code ?

abmat said:

I don’t know. But as it’s the injectors that put fuel into the engine, and you have fuel in your oil how else has it got there?

is it amd tuning that’s near you? Give them a try.

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Thanks for your response, if u take oil filler cap of it stinks of fuel vapours, not noticing the dipstick level rising though to be fair to confirming its dumping it direct in there but something definitely wrong here that’s causing this headache.