[Split] exhaust gas temperature sensor

[shammyturbo]

hi everyone,new to the z22se site and after years of driving scoobys,evos,etc ive decided at a tender age of 40 to buy something very comfey and at the same time nippy its a 2003 vectra turbo(100) and love it ,although ive only had it 2 weeks, but ive a problem of the orange engine light on all the time,took it for the mot and passed with no issues.at the same time the guy at the mot plugged the fault codes in and found that the p0546 code was on it what i understand it being egt sensor,could you kind chaps please tell me 1, where abouts its situated,2,how much it is,3 will it damage the car if not replaced.the car seems to drive fine and pulls very well also its done 110,000,any help would be apreciated,cheers

 

[Matt]

I've split this into it's own thread.

 

[MikeS]

it is situated at the bottom of the cat

people mistake it for a lambda sensor

on pre 2004 cars there was a mixture sensor on the top of the cat nxt to the turbo, an egt sensor bottom of cat and post cat lambda nxt to the flange for the centre section

the sensor controls fueling & boost

post 2004 they removed the sensor and used a mathematical calculation by way of the ecu

sensor costs about £120 new

to check if you have one installed simply follow the intake hose to the turbo before you get to the turbo look directly down by the cam cover and you will see 2 sensors connected to the cam cover / head

one is for the rear lambda and the other is the egt sensor - 2 wire connector !

 

[shammyturbo]

cheers for that mike,il get it soted.