4 fault codes.....

[Buffwesty]

Hello all,

CEL has just come on and I have scanned the car and pulled these four codes, my question is could the oxygen sensor cause all four of these errors? Car is A4 Cabriolet B6 1.8t.

16804 - Cat System, below threshold
16523 - Oxygen sensor too slow to respond
16684 - Random cyclinder misfire, intermittent
16688 - Cylinder 4 misfire intermittent

Should I clear it and see if it goes away?

Thanks,

 

[Paul @ Unit 9 Remaps]

Change the sensor

 

[Darran]

blocked or cracked cat.