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Model specific boards => Golf mk8 => Topic started by: Rosco82 on 08 June 2025, 14:59

Title: Mk8 golf gti - P210100 fault code
Post by: Rosco82 on 08 June 2025, 14:59

Hi all very new here and a first time gti driver , had my car 1 year 2021 plate golf gti
Love my car , but on Friday car broke down and went into limp mode and will only run at 1500 rpm
Diagnostic machine is coming up with P210100 - throttle / engine speed control module , has anyone had any issues with this ? I’ll probably have to put car into vw but a bit scared on costs etc , unsure if this is something that could be fixed by an independent vw specialist ? Any advice greatly appreciated, I’m Glasgow based
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Carlosfandango on 11 June 2025, 00:06
That is a non manufacturer specific generic code I believe, so may be wise to scan with a professional tool, but could be due to the PCM control module seeing a difference between the throttle body butterfly and the actual throttle pedal position, possible carbon build up on the throttle body (unlikely if that age and not high mileage), or one of those parts being faulty!? Might be possible to carry out a throttle body reset/relearn basic setting procedure to the throttle body, but it is possible (although rare) to make things worse doing this if the butterfly has heavy carbon deposits. Could also simply be caused by a dirty or faulty MAP sensor, may be worth removing the map sensor and checking if it’s clean.
Title: Re: Mk8 golf gti - P210100 fault code
Post by: fredgroves on 11 June 2025, 11:25
As with all of these things, its sensor driven fault detection.

Which could mean its a fault detected by the sensor or the sensor being faulty and reading it wrong  :smiley:

I've not seen any car sensors having fault detection on them (like you see on more critical stuff like aircraft or nuclear power stations...) so they can and do often deliver false diagnostic info...
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Rosco82 on 13 June 2025, 14:30
Hi guys thanks for info I had thought the map sensor or pcm after doing a bit of research online , car has went into vw this afternoon so I’ll wait to hear from them , just wanted my car back on the road , and performing as it should.
I’ll update more once I know what issue.

Golf gti mk8 dolphin grey metallic
19” Adelaide’s
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Rosco82 on 16 June 2025, 16:15
So after sending car to vw on Friday I got the call today telling throttle valve needs replaced at a cost of £1256.00 , I have no choice but to proceed with required work , but what I will say is this may force my hand to sell car as it doesn’t fill me with confidence that a £30k car that rolled off the production line in may 2021 so is just 4 years old with 34,000 on the clock and needs a new throttle valve ??
Can only put this down to poor build quality or poor quality of parts either way it will definitely put me off buying another vw , as I expect better quality than this and really this is poor for a car of this standard
Not a happy camper  :angry:
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Exonian on 16 June 2025, 17:43
It’s one of those freak faults. I’d be apoplectic too.
VW issue a 5 year warranty in some countries and many in the UK go for an extended cover package.
It wouldn’t be unreasonable for you to ask for a goodwill contribution from VW so long as the servicing is 100% up to date and it doesn’t have stratospheric mileage.
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Rosco82 on 16 August 2025, 19:18
It’s one of those freak faults. I’d be apoplectic too.
VW issue a 5 year warranty in some countries and many in the UK go for an extended cover package.
It wouldn’t be unreasonable for you to ask for a goodwill contribution from VW so long as the servicing is 100% up to date and it doesn’t have stratospheric mileage.

Not been on here in a while but just to advise vw unwilling to offer any goodwill gesture as far was out of 3 year warranty even though car has 3 services in 4 years at 36,000 miles , according to vw it’s not unknown for throttle valve to need replacing during life time of car , though 4 years is hardly a life time !
I had just about got over it when driving last week car went into limp mode 4000 rpm and said drive to work shop then overheat symbol appeared, pulled over lifted bonnet ( no gas strut appalling ) and water leaking from engine coolant bottle , let car cool added water to high continued to seep out bottle , car started and seemed to be running fine   But had to drive home pulling in every 5 mins making sure water level not too low , I’m really gutted as I love car but feel it’s been build hastily and a lot of cost cutting , I really feel I have no choice but to sell car and cut my losses , shame though I thought I’d own this car for years , someone tell me am I right to get shot or am I being silly , opinions please
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Ewankinch on 16 August 2025, 22:01
Have you had a price from an independent garage for the repair? Maybe once it's fixed take out a service plan with an extended warranty. I might do so once my warranty is out in 2 years time. I know how it feels when you get a big bill to fix a car. But once its fixed you'll be happy again. If you were to get rid you've got to calculate what it's going to cost to get something else. If you trade it in you'll loose a chunk of money and if you buy from a garage your paying a premium. It will probably cost you a few thousand to get something else.
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Rosco82 on 17 August 2025, 00:14
I’ve already had throttle valve replaced at vw crow road Glasgow , car goes in on Monday and I don’t expect it to be major 4-500 including service but it’s more the not feeling I can rely on car , been quoted around 23-24 online valuation, thought about going back to an Audi ,a decent s3 similar age will be about 28 guess I need to think if I’m willing to pay a few more quid to be feel I can rely on car,
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Ewankinch on 17 August 2025, 02:29
The S3 has the ea888 engine that your Gti has. If reliability is your worry I think you need to look at a different manufacturer.
Title: Re: Mk8 golf gti - P210100 fault code
Post by: fredgroves on 17 August 2025, 16:34
What is a reliable brand these days?

Most things are built to not have major faults during their warranty period and after that it's a roll of the dice...
Title: Re: Mk8 golf gti - P210100 fault code
Post by: DSGboy on 17 August 2025, 18:41
I’m with the advice given above Rosco82. Go for a warranty and at least take the big financial hit out of the equation for any future failures.  Go for the excellent value VW All In if you service at a Main dealer or just an extended VW warranty.  Pay monthly if you like.
Personally I wouldn’t run a performance Golf without a warranty backing. ( I’m not a mechanic or gifted with the spanners.)    I’ve done this since 2012 and enjoy the peace of mind.   I will keep a warranty in place until I sell my current 2019 R, would rather buy the cover than have the cost of a big failure.
All that said. If you’ve lost faith/trust and love for  the car then totally understandable if you just want out of it and VW. good luck whatever way you go
Title: Re: Mk8 golf gti - P210100 fault code
Post by: davo245 on 18 August 2025, 09:20
I’m with the advice given above Rosco82. Go for a warranty and at least take the big financial hit out of the equation for any future failures.  Go for the excellent value VW All In if you service at a Main dealer or just an extended VW warranty.  Pay monthly if you like.
Personally I wouldn’t run a performance Golf without a warranty backing. ( I’m not a mechanic or gifted with the spanners.)    I’ve done this since 2012 and enjoy the peace of mind.   I will keep a warranty in place until I sell my current 2019 R, would rather buy the cover than have the cost of a big failure.
All that said. If you’ve lost faith/trust and love for  the car then totally understandable if you just want out of it and VW. good luck whatever way you go

Totally agree always run all in or extended warranty on all our current and all previous VW's essential on any modern car imo as all repair costs are crazy.

Polo Blue GT we have had from new 2015 still under VW extended warranty 86k miles now FVWSH

Air con pump failed few weeks back sounded ternlminal went in to dealer. £1680  to repair warranty covered all the costs.

You may not need it but only one claim you will be quids in!
Title: Re: Mk8 golf gti - P210100 fault code
Post by: Rosco82 on 18 August 2025, 17:18
I’m with the advice given above Rosco82. Go for a warranty and at least take the big financial hit out of the equation for any future failures.  Go for the excellent value VW All In if you service at a Main dealer or just an extended VW warranty.  Pay monthly if you like.
Personally I wouldn’t run a performance Golf without a warranty backing. ( I’m not a mechanic or gifted with the spanners.)    I’ve done this since 2012 and enjoy the peace of mind.   I will keep a warranty in place until I sell my current 2019 R, would rather buy the cover than have the cost of a big failure.
All that said. If you’ve lost faith/trust and love for  the car then totally understandable if you just want out of it and VW. good luck whatever way you go

Thanks for the advice , I bought car as second owner and was still within 3 year warranty I really considered the car as pretty much bummer proof if well maintained, wish I’d looked into an extended warranty now ,anyway car got serviced this morning at approved vw specialist , interment fault showing on water pump although they said it tested fine they would recommend renewing at a cost of £1000 , that’s nearly £2500 in repairs in 18 months never mind the services I’ve had done since owned , I don’t think I have any option but to sell sell sell and quick before I have to do more work love my car but at this rate I’ll be in the gutter and car still won’t be right , thanks for everyone who took time to reply to me , hope your vw s fair better than mine
(https://i.postimg.cc/SN5w2yTz/IMG-1018.jpg) (https://postimg.cc/tY3r8HHX)

(https://i.postimg.cc/k5NZpWnx/IMG-1019.jpg) (https://postimg.cc/bGJ3GDSJ)