AA have been and put there code reader on it, said there were codes stored, 2 cylinders had a miss fire. Cleared them, said there's nothing he could do unless the codes were live. Said it's possible one coil pack could break down, to then show two miss fires on separate cylinders. Then said it could have been condensation or bad fuel. 

So that's it, unless it were to happen again. It's been 100% reliable until today, apart from the new battery which didn't stop it from starting. 

The s/s light has gone off, too. 

That was no use whatsoever then. 

1 hour ago, Breezy_Pete said:

That was no use whatsoever then. 

His diagnostic reader looked basic, but I may be wrong, generic for all cars, possibly. Came up with nothing extra that what mine had. 

I priced up a new coilpack up, they're around £15 each to replace myself. With it being a multi cylinder miss fire I'm not convinced two or more would go together. Could be fuel, mechanical, who knows. I have my car booked in at the dealers for a diagnostic in two weeks time, I'll keep an eye on my car until then, if it doesn't happen again, I'll cancel it. If it does I'll ring the AA out again & they can mess around with it again. He said if it had been a live code He's be able to do something about it & possibly have my car transported to the dealers. Makes me wonder why bother with codes at all, if you can't diagnose a fault that was logged a couple of hours prior to him arriving. Maybe down to the fact it was a basic code reader he's used. 

Well I've been out in my car for over an hour today from a cold start and it's running A1, so at the moment I'm thinking possible contaminated fuel or maybe blocked injectors? Suppose I'll find out within the weeks to come if it were to occur again. 

A week ago previously to this I'd filled up with Shell e10, not the most common fuel I use, was just passing the garage. At this point I'm not sure what this issue was. Apart from rough running and fault codes relating to injectors 2 and 3. A static ecu light then eventually changed to a flashing light. 

I'll update if anything else was to occur. 

 

Update of sorts.

5 weeks on from the above issue, may car has been A1 since. Started my car this morning and a start & stop error came up on my dash, nothing unusual about that. As it's done this intermittently since I've owned the car. I then started the car again the same day, S/S light appeared again then the yellow ECU light flashed continuously afterwards for around 10 seconds whilst the car was at idle, then went off & stayed off. Checked to see if any codes were stored with my cheap plug & play diagnostic reader, no codes stored. 

I'd prefer it if my car failed completely for Skoda Assist (AA), to then take the car away to have it diagnosed at Skoda dealer, as i have the extended Skoda warranty, rather than living with an intermittent issue. 

 

Light came on again from a cold wet start, ecu flashed for around 10 seconds went off again. 

Checked codes with my generic code reader, again. Codes logged pending, plus one extra than before.

It's a 2-6 week wait, dependent on where you go to get an diagnostic booked in at the dealers. 

Once I get to the bottom of it, I'll post again. 

Extra code attached that wasn't added earlier. 

 

Hopefully final update.

I booked my car in today at a Skoda dealer with a potential £126 diagnostic cost. 

I was informed that cylinder 2 & 3 misfires were caused by faulty plugs & plug within cylinder 1 was marginal, I'd had all 4 replaced by them 15 months ago. So Skoda agreed to cover the cost of replacing them, yep 3 not 4. So I covered the cost of replacing the fourth one myself, although the dealer said they wouldn't charge me labour to do so on the fourth plug😂So the single plug cost me £24.24 inc vat.

Hopefully that's it now, no more intermittent EML lights.

Is there a potential plug issue with the 1.5tsi act engine or have I just been unlucky?

Interesting. What part number are the new plugs, please? 

Fingers crossed that's all sorted now; good result. 👍

2 hours ago, Breezy_Pete said:

Interesting. What part number are the new plugs, please? 

Fingers crossed that's all sorted now; good result. 👍

I hope so, I've been putting up with this very intermittent issue from around Jan this year, last few weeks it became more prevalent. 

Part no U05E905602. £20.20 plus £4.04 VAT= £24.24 per plug at the dealers, obviously. NGK then? 

It's due for a major service in 8 months time within the "all in plan", I've paid for. So I think I'll ask to keep my old plugs (being 8 months old by then), so that I could use them again, once it's out of extended warranty. 

Edited 7 November, 20232 yr by Phoenixboy

I've also generally noticed that my engine feels a lot smoother now (warm and hot), no jerkiness from a cold start either. I'd reommend anyone that suffered from cold running issues with the type of engine (1.5tsi act), to replace their plugs. 

Soon after I bought my car around 16 months I had my plugs replaced by a Skoda dealer, obviously one or maybe two of them were faulty, causing a slow deteriation with my engine running from a cold start. Obviously my eml light only came on when the symptoms became more obvious.