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Discussion Starter · #1 ·
New here as I have a problem with a car I just purchased.
The EML light is on in the car and I assumed it was an o2 sensor so it was renewed. Once it never worked I done some more investigating and it turns out the cat has been removed and the hole where the second o2 sensor goes is blocked off with the plug just dangling.

I have a couple of questions.

1/ Should the plug that is in the o2 sensor hole come out?

2/ Can anyone recommend the correct defouler to use to take the light off

3/ If a defouler is put in with an o2 sensor will the car fail an mot due to no cat?

I should note the car drives great so I am assuming the car has been previously remapped

Thanks for help

Automotive tire Wood Bumper Grey Automotive lighting
Synthetic rubber Carbon Cylinder Tints and shades Auto part

Super Moderator
2017 Kona Blue ST1
3,056 Posts
Ummmm. It looks to be broken off.
Take a picture of what's hanging down.

Also thanks an aftermarket performance exhaust from the tag
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