Hello all. Another new member based off having a Skoda issue seeking knowledge as to what it could be please. 2015 Octavia vRS 2ltr TDI goes into limp mode mostly during warm up phase but also at other times. The garage have had the computer hooked up but no fault code generated. Any ideas as to what could be triggering. Restart clears limp mode. No clear pattern that triggers. Eternally grateful for your consideration.

I'd be more than surprised if limp mode was activated without a DTC being generated!

What fault light displays on the instrument cluster when this happens?

What equipment are they using to check?

Hi, the garage has technicians with VW and Skoda experience such they claim to maintain dealership level service and have google reviews to substantiate. I expect they have the necessary tech level equipment for full diagnostics. I can't recall the 4 letter acronym of the device they should have for full diagnostics, contains a G though I think?

Aside from cruise control display turning orange with an exclamation mark highlighted there are no warning lights on the dash.

Driving from Wales to the Midlands, many roundabouts with lights. Exiting those junctions onto the straight, accelerating hard out of them is often a limp mode trigger.

The issue predominantly occurs during car's warm up phase, half a dozen times on average the car will need to be restarted. When engines hot sporadic limp mode occurs mainly when accelerating hard.

Driving like I'm 70 years old defeats the point of owning an Octavia vRS.

I can't believe I got rid of a MK2 with the same, no way near as bad, issue and the threads not to be full of people experiencing a similar issue, or just my rotten luck?

That sounds like an over sensitive traction control issue - but you imply there's no indication on the instrument cluster for that?

Edited 19 May19 May by Warrior193
correction

4 hours ago, Warrior193 said:

That sounds like an over sensitive traction control issue - but you imply there's no indication on the instrument cluster for that?

I can confirm there is no indication of a fault on the display bar the cruise control symbol and an exclamation mark highlighting in orange.

Thanks for the tip, I will suggest to the mechanics when it goes back in.

Is the car tuned? engine ecu? gearbox? (if it's a DSG)

I'm asking because I've seen an audi a6 TDI whit a ecu tune and some parameter were exlued from giving warning light on the dash but the fault was active but not stored and causing the ecu to go in limp mode, in the end after fashing the ecu back to original they were able to see the fault and was a oil temperature switch readin 1000°C

Edited 20 May20 May by Jack25

Get the battery voltage checked plus make sure terminals are secure and clean plus earths. Make sure battery is secure as well. Had problem with old skoda that the mechanic who was servicing it forgot to tighten battery securing clamp and one terminal so when going into tight corners battery was moving and causing bad connection.

Alasdair

On 19/05/2026 at 10:09, CrassAss said:

Hi, the garage has technicians with VW and Skoda experience such they claim to maintain dealership level service and have google reviews to substantiate. I expect they have the necessary tech level equipment for full diagnostics. I can't recall the 4 letter acronym of the device they should have for full diagnostics, contains a G though I think?

Aside from cruise control display turning orange with an exclamation mark highlighted there are no warning lights on the dash.

Driving from Wales to the Midlands, many roundabouts with lights. Exiting those junctions onto the straight, accelerating hard out of them is often a limp mode trigger.

The issue predominantly occurs during car's warm up phase, half a dozen times on average the car will need to be restarted. When engines hot sporadic limp mode occurs mainly when accelerating hard.

Driving like I'm 70 years old defeats the point of owning an Octavia vRS.

I can't believe I got rid of a MK2 with the same, no way near as bad, issue and the threads not to be full of people experiencing a similar issue, or just my rotten luck?

Very surprised there are no DTCs. Sometimes stuff like a misfire don’t log a code, but anything worthy of the car going into limp mode is almost certain to be logged.

Have you tried yourselves with OBD11 or similar?

It sounds like bad luck - these cars have a pretty good reputation on the whole. Sure, there are the usual TDI issues, the TSI engines all have crap water pump housings, the infotainment system is rubbish and some panels are made of chocolate, but on the whole they are reliable and good value cars. At least, from what I’ve seen anyway.

The TDI vRS drivetrain is shared with the GTD, Leon FR 184ps and some A3s. The same basic EA288 lump is used across many cars - Arteon, Passat, Golf, Leon, Ateca, Superb, A3, A4 and more. Aside from oil consumption, it’s generally pretty good.

On 20/05/2026 at 15:37, Jack25 said:

Is the car tuned? engine ecu? gearbox? (if it's a DSG)

I'm asking because I've seen an audi a6 TDI whit a ecu tune and some parameter were exlued from giving warning light on the dash but the fault was active but not stored and causing the ecu to go in limp mode, in the end after fashing the ecu back to original they were able to see the fault and was a oil temperature switch readin 1000°C

Thanks for commenting, I'm the fifth owner, idk what previous owners have done. Skoda garage informed me its not possible to tell if my model has been mapped, you didn't mention that but I will show the mechanics this thread.

It could be carboned up veins in turbo that is causing a blip which will put into temporary limp mode especially when accelerating then clear once restarted or failing/clogged boost pressure sensor/vacuum leak/N75 valve. They can both cause I think called temporary/soft codes that some scanners don't pick up. Had similar in my old octy. Stopped and started again and back to normal. No EML on each time but eventually got a code plus EML that it was over boosting. Turned out to be sticking actuator in my case.

Reckon a scan with vcds is required as it should pick up any codes that other scanners miss.

Alasdair

Update, problem solved. The garage had a straw to clutch at but it didn't feel relevant. I passed on above suggestions and getting the ECU checked over first seemed the sensible thing to do. Updated software and reflashed to latest version.

Came back previous MAP had a fault code removed for oil. The car should've been been showing a glow plug warning on the dash.

2 oil pressure switches replaced and the problem appears to have gone.

Thanks everyone for the time and consideration

For anyone else with a no fault code showing, perhaps get the ECU checked out, not cheap but at least you should find where you're starting point is if someone's messed around with it.