This happened today

2014 S3 octavia [Tour De France model with 2l diesel 4x4] 130k miles

MOT 600 miles since ago. Passed easily so am told.

Was doing maybe 85 [Yes I know] and had to brake heavily down to 30 or less, HGV semi swerved 3 lanes into my lane directly if front of me. Shifted down the gears to help with some engine braking, down to 25mph] As I shifted down to 2nd, light popped on dash. Checked manual after getting and states the warning light is as mentioned above.

Coincidence? Drove maybe 50 miles after, stayed on.

My tester is loaned out right now [maybe tomorrow will have it back] Probably phycological but have noticed this past week having to shift down to navigate hills [live in mountainous part of Wales] I always take note of rpm on shift changes.....the grunt is not there below 1700...results in slight torque shudder [obviously manual]

Hoping its not much of a repair, just spent 6k on new rear diff plus 3 complete rebuild front suspension and full braking system.

Tks for any observations.

Keith

Could be anything, but will probably be something with the DPF, hopefully just a sensor fault

Possibly turbo boost control. Does the engine go into limp mode?

Scan for DTC then clear and see if everything goes back to normal.

Edited 6 October, 20256 Oct by Warrior193
correction

Tks for that.

No, drives as normal but appears to need more foot to the floor getting up to gear change speed

Will have my scanner back this morning hopefully, Course its at an age where one thing after another will fail

I normally do 2-3k miles a year at most [even then always do oils etc annually] but last 3 weeks have put 2500 on, had visitors from overseas. Been driven pretty hard.

Diag says P0401...egr or ???? could be anything of course. States not enough gas recirculation, to clogging to sensor to vacuum.

4k miles ago I had a whole new inlet manifold kit done..was leaking coolant [at skoda...fortune] Nothing else found.

Have removed code, will see if returns.

Tks for all the pointers

With you previous low annual mileage, it could well be that the EGR valve needs a removal and clean.

Was afraid of that.

I know when I was told my leak was egr cooler it was 6 hrs to get the thing out, in the end was inlet manifold.

To be honest goes with how the car has reduced performance last few days. Higher rev's needed to get up to gear change level. Lower fuel economy too of course.

Assuming a clean is needed, anyone done this while valve still in situ?

On thought on the above. Two weeks passed emissions easily...would the above fault show at all.?