My 2012 Yeti 4X4 Tdi had its E189 mod. done a year ago. Annual mileage is very low. Prior to that it had the expensive EGR + cooler assembly replaced with new.

 

Now at 55k miles the Throttle Position Sensor (G69) is producing P0121 intermittent/implausible signal faults.  Does anybody think this recent problem can be triggered by the E189 emissions changes? I'm considering getting the car looked at as a 'complaint'. Has anybody else done this and had parts in the emissions system replaced under the E189 'guarantee'? The rub is they will want £99 for a diagnostics check first, even though I have a full vcds results log.

if 'They' is a Dealership, get onto the Guarantee Provider ,  Skoda UK / VW and get them to get that sorted out, Skoda / VW are paying not you.

Thanks, yes it's a Stealership and the car is booked in, but can I trust them to determine if the E189 fix was contributory to the throttle body failure or not? My feeling is to complain hard but if Skoda won't pay I would probably be better doing the repair myself at their labour rates. Then at least I can do my own thorough examination, post up what the body looks like and the cause of failure on the flap pot, which some suggest is caused by oil contamination (?).

 

I appreciate these parts can get clogged over time and may be mine was going that way. But I'm suspicious that the E189 mod. may have made it fail much sooner than it should have.

The thing is that VW Group were the ones offering the 24 month peace of mind guarantee.

You can have them arrange to have your car collected and a courtesy car left until they arrange correcting issues from The Fix you allowed them to do to satisfy the Government.

Not for you to pay for the diagnosis if there were adverse affects on your vehicle, or to be out of pocket.

The letter I had from Skoda said 'If a customer makes a complaint to an authorised repairer or to the VW group in respect of a failure of the EGR, fuel injection system or emissions after treatment system within 24 months following date of implementation Skoda would consider the complaint very carefully'.  There is so much legalese and definition I just wouldn't trust their statement and rely on it. Is the TVA within  their definition of the emission system or not?  'Considering a complaint' sounds as though it could be drawn out with no success at the end and my money shelled out up front.

 

From some research I've done used TVAs part 03L 128 063R are plentiful and there are some new OE standard equivalents for around £125. Then there is the possibility of seeing what's wrong with mine, cleaning and possibly fixing it for a future hot spare. The other benefit is I get to analyze my own problem and share it with members here. Worse case at the Skoda Stealer I could be looking at £99 for diagnostics, £400+ at their parts prices + labor on top.

 

On my Tdi 4X4 CFHC engine the TVA is at the front, although getting to the manifold flange bolt underneath looks tricky (ideas?). At the moment I would just like to dump Yeti on the Skoda forecourt and get it fixed under their complaint procedure.  I cannot see how they could guarantee it gets fixed for free without dismantling it and once they start taking parts off, I have no car and I am committed. I can see them trying to wriggle out of an E189 fix related claim and a big bill for me, set against up to £125 and I bite the bullet to swap it out myself. I can charge myself £99 for using my vcds!

 

Lesson may be learned: Don't have the E189 fix done!

My 2012 yeti 170 had this problem at four and a half years old, 32000 miles, before the fix. Put right by my local Dealer (D.M.Keith Bradford) at no cost to me. Skoda Paid.

Throttle body cleaned and a mod done to stop a reoccurrence. They also replaced  the throttle sensor and the accelerator. Had a loan Skoda Superb whilst Yeti was off the road. The car had a dealer full service history. Good luck Voxmagna

Picture from internet

Thanks captainslogg, I know about the throttle body mod. I haven't been near a Skoda dealer for years on regular service and the money I have saved is the risk I take to sort this problem out myself on a 5 year old car. I'm leaning towards a new OE equivalent TVA and mod. the unit removed as a hot spare for the future. Many are saying these TVAs give trouble and my (wifeys) Yeti is not high mileage and suffers a lot of local city driving to shops (bad for diesels!).

I made exactly the right call on DIY.  I bought a nearly new TV unit for £70 which took a day to fit first time around, including input manifold remove and clean. I could do it quicker next time. The old TV was cleaned up, torn apart and now tests out fine for a spare.

 

If I'd gone to the Stealer they would have charged me up £99 for their diagnostics + time to remove the TV and see what it looked like, then disputed it as an EA189 diesel fix warranty claim. They would have been within their rights, because no way could my throttle valve be so gunged up a year after their ECU fix. I couldn't have got the car back to do it myself and would have been left with their big bill.

 

For anybody else in this position, you can disconnect the steel link pipe bringing in exhaust gas emissions to the TV in about 15 minutes. Then pull out the bush/gas distributor from the TV body and get a snake camera inside to look at the TV condition. Although I've always found it difficult interpreting those distorted images from snake cams?