Cat temp sensor

[cortexx]

What is the function of this ? Does it feed back to the ECU to help the fuelair mixture ? maybe on cold starting ?

I have not seen it on any of my other vehicles .

is it bad to remove it ?

[Nismo_line]

it will just flag a check engine light when you take it out

[bobbo]

it will just flag a check engine light when you take it out

No it won't... atleast mine didn't.

[derbeck]

I would think a cat sensor would show overly lean and when you put in an apexi it will flash if knock is too high

[Zacho]

it will just flag a check engine light when you take it out

It won't.

This sensor has it's own light on the dash(at least mine does). It is a temperature sensor and it is supposed to turn the cat overheat light on when the temperature in the cat gets too high (signaling a plugged/clogged cat).

[Nismo_line]

ya i meant the cat light sorry just going by what i was told

[cortexx]

So basically its just a safeguard to tell you that the cat has a problem .

Good , so no harm done when i remove it to use the floor bung for my wideband O2 cable !

[DarkCaporaL]

Apparently it needs to be grounded or else the cat light will stay lit in your dash.

[Vulcain]

IT'S only a temp sensor on your cat.

The light turns on when the temp. on cata exceed 850 C or 1562 F.

Its his only function.

when you put in an apexi it will flash if knock is too high

exact + I don't know if its its like for everyone who runs an apexi, but mine, lights flash if there are too many knock, or if the limit set of injector duty cycle is exceeded or if the limit set voltage of MAF is exceeded.