Afternoon.


I had my car mapped just over a week ago. Over 60 miles into my journey home (motorway cruising) all was well. Got off the motorway and started coming across B roads and firs time I put my foot down it threw an EML.

Had it checked and it was the 02 sensor throwing a fault in the down pipe (I have no cat in my car but I haven't had on on any of my previous maps). I reset the fault and it has been off all week. Given it a bit of stick for basic overtakes etc and was fine....gave it a blast for above 5 seconds and bam, EML.

Is this likely to be the 02 sensor or the map not being set with a high enough reading for emissions? Just like to know so I know what to expect.

Thanks!