Breezy_Pete

Cos they're crap, probably.

It's not clear from your opening post whether the coil pack(s) (not sure if individual ones or one for all cylinders on your engine) was replaced? You seem to say it was 'checked'. Engine code always useful, check boot build sticker if you don't know what it is.

Biggest difference ever... I really wish people would start out with engine code on engine-related enquiries. Not sure what your code reader is playing at, nor what parts you've really been swapping, but according to circuit diagrams and parts catalogue a BNV engine has no DPF, so no exhaust gas temperature, exhaust pressure or lambda sensors. Message me with your VIN please, for checking things out. And find a local member with VCDS to do a proper fault read (or get VCDS lite yourself, which will work on your car, for just the price of a cheap kkl cable)

Duff info, sorry, looks like it mounts like this (bearing in mind this is a Left Hand Drive depiction, so mirror everything). You can probably refit it without unplugging any connectors, so ignore stuff about that.

No screws, it just clips into place with cables all hanging vertically down, I think. Outboard edge goes in first, from memory.

According to wiring diagrams for BMS engine code (is this what yours is?), exhaust gas temperature sender No.1 is G235, but has a black connector; No.2 is G448 and has a brown connector; No.3 is G527 and has an orange connector. So it's not massively clear to me whether you've changed the correct one or not. The fact that you now have codes for lambda sensor and exhaust gas pressure sensor suggests maybe you have got the right temperature sensor, but other issues.

"Steering column electronics control unit" appears to be what the cruise switch connects to first. Did your vcds scan include that unit?

Prepare to be very surprised.

The 2004 wiring diagram will show every wire in the (Fabia) car that goes to the ECU. Search the document by your engine code.

No worries 👍

I think much of the confusion stems from the fact that when not full, AGM or EFB batteries MAY be charged harder and faster than normal lead acids. People falsely extrapolate from that to thinking they must be charged at a higher voltage.

Well done, have you still got the old pump by any chance?

I bought (well, received as a present tbh) a cheap battery charger recently. It has 4 modes including AGM. On both wet and AGM batteries I tried it on, both of which were low on charge, the difference between normal and AGM appeared to be a slightly lower voltage for the AGM mode. This aligns with my understanding that overcharging is the main risk with completely sealed battery technologies. Probably also what's really behind the whole "only charges to 80%" thing in active service, but dressed up by marketing as 'micro hybrid, energy saving'.

Fan control wire is at pin 12 of 91-way connector at engine ECU, black/violet 0.75mm² And with battery in boot, you're looking at the *3 versions of the wiring in the screenshot above. clicking should make it bigger/clearer, I hope. Who are you directing that towards, the OP, or @Bepis?

Yes, but only relating to the accessible front door bellows, where the lock motor wires are not accessible. Which diagrams do you mean @ApertureS?

Which one did you change? What colour connector?

I think so, yes. Check the wiring out thoroughly first though. And fuse 18, the ignition switched feed fuse. And the black/violet wire from engine ECU. Give me engine code and I can probably find pin number at ecu. Tomorrow.

Built into the right-hand fan in that pic, judging by number of wires. Something like this, where J293 is the control module.

2016 car? I think I'd expect the control module to be built into the main fan if so. How many wires and what colours at main fan connection?

Did your latest refiller do a test with pressurised dry nitrogen gas? Any written evidence of? Should have, since there was knowledge of a recent refill. Vacuum hold test not as good.

Sounds like only the passage of time will help you realise I'm right. Good luck.

More of a completely unnecessary 'chavgrade' tbh, but each to their own.

That'll be leaking then.