Symptoms @Chrisooo97 are mainly the annoying Lamp as it could be serious. The car sometimes acts like it's going to stall when Cold (never does), and smells bad at start up. I also have a gearbox issue 6speed auto) and when it's cold it has hard changes - which is the other reason the MIL comes on. I just hope the sensor issue isn't going to blow up the engine, I've changed 3 sensors now and still haven't been able to fix it.