My lads car.

Engine warning light on. Stop/start has been turned off and turbo, presumably by the engine management. Other than that, driving normally.

Want to get an OBD2 reader, cheap. Any recommendations?

Ideally to work ok with android but can borrow a laptop if necessary.

Totally out of my depth on this, help!

Just got an Ancel AD310 standalone unit, also for my sons car. It worked. Can’t really say much more. It’s not the cheapest on Amazon, but you get the codes decoded in the unit, which cheaper ones don’t. But I’m not an expert.

cheap you say?

https://www.ebay.co.uk/itm/ELM327-V1-5-Bluetooth-OBD-2-For-Android-Torque-Super-Diagnostic-Code-Reade-S/174076083388?hash=item2887be3cbc:g:PLcAAOSwrR5bjOtC

https://play.google.com/store/apps/details?id=org.prowl.torque

May or may not work / set your car on fire.

I managed to read the codes from my bmw with one..