Breezy_Pete

Please let us know what you find. Best of luck. 🙂

There are some wiring diagram pdfs amongst the downloads here: I'm not sure which wheel speed sensors are used for vehicle speed calcs, but I think it will be more than just one of them. Possibly all four.

Do you see 12V at the pin that fuse supplies at the PAS pump, when ignition is on? Black/yellow wire, pin 4 of the 4-way connector.

Was cabin fuse no.7 one of the ones you've checked??

Fuse 60 should depower the alarm horm, fuse 49 should disable the central locking. Best of luck and Merry Christmas.

This relay is soldered into the board. Have a look in the Fabia Guides subforum, there's a thread titled Wiper relay replacement or similar.

Yes, that's the relevant control unit, but I really would urge you to check the fuses yourself. There is a relay in that unit that can cause front wiper inaction if it fails, but I don't recall it having any effect on the washers. By Boxing Day I can look at the circuit diagrams for you and offer more targeted advice.

When you are referring to "ECU" be aware that there are many, and the relevant one isn't the engine ECU.

On a mk1 Fabia there's a non-obvious fuse failure that causes this. I'm not sure what number the equivalent is on mk2, but I'd be surprised if there isn't one, as mk1 and early mk2 electrics are very similar. Check all the cabin ones yourself, after taking photos of where they all are before touching any. Then check them one by one.

1.2 TSI or 1.2 HTP engine?

I'd be happy to have a look at it Ryan. I did repair what may have been the same unit type in a workmate's Fabia by just resoldering some of the connector pins. Getting to the board they were on was quite a mission though as I recall. Different fault, that one was intermittent speaker connections. See if waggling that grey/blue wire makes it come alight?

Backlight feed seems to be on the same pin on each car, pin 6 of black 8-way connector, so perhaps it's just a fault with the one you've bought?

Will compare wiring info when I next get up.

Do you know what year Octavia it came from, roughly?

Perhaps he's thinking of the very first VAG 3-cylinder engines in mk1 Fabias; they had a tendency to burn exhaust valves?

It only takes one piece of online info to be assumed correct for others to copy it. It's very easy to put stuff online.

Where is the online info from? Link? Unless from an official Skoda site I wouldn't trust it to be correct.

Agreed: I inexplicably thought we were discussing a petrol car.

Yes, the single cat ones must be adequate to pass an MOT; they will have worse emissions early in the warm-up phase of a drive cycle, but MOT tests up-to-temp tailpipe emissions only.

Longlife oil used in a car set to QG2 is OK. So use either 50200 or 50400 Non-longlife oil used in a car set to QG1 is not OK. Use only 50400.

Sounds like a logical idea, but fairly pricey to replace. Finding an OE type twin cat exhaust section may be a big challenge, most aftermarket replacements omit the precat, I think.

A witnessed scan of the ABS module (after a little test drive just in case they clear it prior to your arrival) showing no faults would be much more convincing, in my opinion. A printout or screenshot of the previous scan showing (just) this low voltage problem would be reassuring too, but I doubt it will be forthcoming.

https://www.clubpolo.co.uk/topic/342411-dtc-17550-17558/ May be worth a look.

No. Fuel pressure is fixed at 3 bar by combined filter/pressure regulator near tank.

Oh, one more question- if you hold the key fully turned in the unlock position for a few seconds (with door locked initially), do both windows start descending?