ScoobyDoo69

iTrader: (17)

Hey guys,

Is the 02 sensor required ?

Mine rattles like a good'un in there, makes a horrible noise. Are they required for anything? I know if I remove it I'm bound to get a CEL, but just wondering if I can remove it, and bung it up with no adverse affects?

Regards,

ScoobyDoo69

94 scooby

iTrader: (1)

you mean the sensor in the catalytic converter?if so you dont need that sensor

ScoobyDoo69

iTrader: (17)

Yeah, pretty sure it's there just to ensure the cat is working efficiently?

94 scooby

iTrader: (1)

well i removed mine ror a decat pipe and never replaced the sensor and all works well

my94wrx

iTrader: (4)

year and model of car would help to ensure you get a accurate answer.

ScoobyDoo69

iTrader: (17)

2003 STi

Midlife......

iTrader: (2)

I'm sure that the newage ECU uses info from the rear sensor to check on how the front sensor is doing (as well as working out if the cat is still there).

JGM mentioned it on an exhaust thread a few weeks ago.......either that or I'm making it all up. Just off to look for the thread

Shaun

Midlife......

iTrader: (2)

Found it.....

https://www.scoobynet.com/general-te...en-sensor.html

see post 6

Shaun

ScoobyDoo69

iTrader: (17)

I see, interesting. Why the hell does it rattle so much in the decat pipe? It was fine in standard pipework, but as soon as put into the decat pipe, it rattles and sounds like a leak. Very annoying!