Halfords sell top up kit £30 trigger (re-useable) and £100 bottle gas r1234yf (it holds about three top ups & £10 back when empty). This is a simple task to do run engine with A/C on for two minutes, connect trigger/ gas, pull trigger, and check gauge reading, keep going till gauge is green. Voi...

I had amber MIL on, scanned car (using Delphi 150) got code P0096 Intake Air sensor 2 bank 1. When I read live data the intake sensor was showing 130° C. Yet outside temp was 4° C. I removed sensor and checked continuity reading was 65.7 Ohms (should have been high in k ohms), thus confirming fault....