Love my Fabia bought it from new 6 years ago, no problems at all until now. It's suddenly decided to idle at about 1400rpm all the time, cold or warm. No apparent way of adjusting it downwards. No other issues, warning lights etc. It works perfectly well apart from this.

Just in case this is relevant it's a 1.0 TSI auto with a DSG box.

I have scanned through this forum for anyone else who mentions this but couldn't seem to find anything.

Any help or pointers appreciated.

GPF. Gasoline Particular Filter.

AFAIK GPF regens are (unlike lower temp DPF) passive. From memory, GPF's only regen at high temperature, so surely this wouldn't affect the idle on startup?

My vRS does it's regen by holding a lower gear for a bit (usually after I've put my foot down). My other half has a 1.0 DSG Ibiza (same engine as the Fabia, I think) and I don't think either of us has ever noticed it regen.

Generally, you'll start with an idle speed of 1200-1300rpm, before it drops to 900ish. Has the car been into Skoda at all? I know there was a software issue with a higher idle being used (at cold start) to help with the kangarooing issue.

I'd also take a visit underneath the steering wheel to the OBD port and see what the car is saying - could be PCV/O2 sensor/vacuum leak/etc, some of which might not show up on the dash, as the engine might not think anything is wrong. What is the MPG like @Sensayuma? If you have an issue that is causing a high idle (beyond GPF, etc) then it would likely also result in lower efficency.

Surely / Shirley is all fine and well.

But it is as well reading the threads of those that had the 1.0 TSI,s with GPF,s doing high idle speeds.

No GPF light on or anything. but the High Idle speed and car running away from them.

Not a regen which is done with high temp and lifting off the accelerator and during deceleration.

Edited 8 March, 20251 yr by Ootohere