Lambda Sensor/catalyst Change?

[top_driver]

I’m in a bit of confusion and frustration at the moment had my car at a garage to have what is supposed to be an easy job of a lambda sensor change but they say to me that in order to change it I need a more costly catalytic converter change too because the sensor is seized I don’t buy that i need to change anything other than sensor does anyone know if this is possible

[tonyav]

The reason I say that you maybe better off with a ring spanner is that usually a socket won't go over a lambda sensor ( looks a bit like a spark plug ) td.

[top_driver]

The socket I have today has a side missing so the cable can go through it. I saw it said oxygen sensor on label so I decided to pick it up for €18. And I got some penetration spray

[tonyav]

Haven't seen one of those before, Should do the job then, td.

[top_driver]

Just to make sure my diagnostic says behind catalytic converter does that me pre or post cat i think post but now im not so sure

[sddsddean]

Probably a bit late(!), but 'behind' to me would imply after (or post) cat.