Help/info please guys;

I've been to Oxford and back today, so 80 miles each way.

On the return after about 5 miles I stopped for a sandwich in a layby, left the engine running for 5 minutes and rejoined the dual carriageway, bit of right hoof, but not excessive, certainly didn't trouble the red line.

Noticed the yellow EPC light was on, pulled into services checked handbook - can continue at reduced power.

There was no reduction in power, it drove normally.

Then there was "Error stop start system" it was switched off anyway

And "Error ACC" speed limiter still worked though

Got home and got the following faults from OBDeleven

P2B9300 - Wastegate Position Sensor "A" Exceeded Learning Limit

static

Date: 2026-02-18 13:45:51

Mileage: 50777 km

U112300 - Databus error value received

Intermittent

Date: 2026-02-18 13:45:52

Mileage: 50777 km

I started the car after the scan and no warnings/lights etc all looked fine.

I've cleared the codes and put the car on the battery tender.

Is it "just one of those things"? Or should I expect it to go boom. I've had the car from new and this is the first time anything like this has happened.

Cheers

Edited 25 February25 Feb by Cakemonster
Added fix

My mk2 1.9tdi used to do the same. It was the wastegate that was sticking and causing overboost. I lubricated mine and manually operated until it was smooth and it hasnt done it again since. When it did happen if I turned engine off and back on again it reset and warning light disappeared until next time. It used to happen very randomly.

Alasdair

Meant to add check the voltage on your battery first. A low battery can cause all manner of faults. Just realised you have it on charge. Worth checking voltage anyway.

Alasdair

Edited 18 February18 Feb by Alasdair1
missed something out

Just now, Alasdair1 said:

Meant to add check the voltage on your battery first. A low battery can cause all manner of faults.

Alasdair

I keep it on the battery minder at this time of year especially as it's the original battery.

Luckily a mate is coming over tomorrow he can give me a hand - he doesn't know it yet

On 18/02/2026 at 16:50, Alasdair1 said:

My mk2 1.9tdi used to do the same. It was the wastegate that was sticking and causing overboost. I lubricated mine and manually operated until it was smooth and it hasnt done it again since. When it did happen if I turned engine off and back on again it reset and warning light disappeared until next time. It used to happen very randomly.

Alasdair

Update; I've lubed and moved the linkage on Thursday and it's been fine since.

I'm going to remove the linkage and give the pivots a good clean (if it ever stops raining...)

Cheers @Alasdair1

Glad it was a fairly simple fix. Definitly worth removing and cleaning up plus extra lube.

Alasdair

On 21/02/2026 at 17:51, Cakemonster said:

Update; I've lubed and moved the linkage on Thursday and it's been fine since.

I'm going to remove the linkage and give the pivots a good clean (if it ever stops raining...)

Cheers @Alasdair1

So, after doing some research, hopefully I've fixed the issue.

VW/Skoda do a new arm and e-clips for around (£65 ish) from various eBay suppliers. It doesn't look like the clips are available separately.

So I had a go at a DIY fix.

I got some replacement e-clips from a fixings supplier to suit a 10mm OD rod (£5 for 10 Inc postage) and some nickel based anti seize (1300°C) £8 including postage

First I removed the heat shield from the top of the turbo - 1 no. 10mm hex bolt and 3 M10 xzn/splined bolts to give me a bit of room.

The OEM e-clip broke into 3 bits and was corroded onto the bar & pivot.

I had to lever the actuator arm off with a combination of ever increasing flat head screwdrivers and hammering a old ½" extension bar against it and it eventually came off.

(I did begin to panic halfway, when it was stuck, completely jamming the wastegate)

I then cleaned both pivot and bar with 240g wet and dry, then wiped them with brake cleaner.

Then applied the nickel anti seize to bar and pivot. I stuck a new e-clip to the pivot with the same anti seize to prevent it falling off and pushed it home with a screwdriver. Then wiped off the excess anti seize.

Before

After

Sorry about the quality of the pictures, not much space to work in.

Hopefully this'll help anyone else with the same issue.

Looks better than new. Mine was the same although I admit I just oiled and moved it till everything was moving freely then added some copper grease as I had a tin handy.

Nice tidy job

Alasdair