Technical The oxygen sensor

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Technical The oxygen sensor

Chelsawy

New member
Joined
May 16, 2007
Messages
21
Hi there ,
where is the oxygen sensor in the exhaust system , is it before or after the catalytic converter ? and how can i check that it is working perfectly ?
 
Joined
Sep 12, 2004
Messages
39,858
Location
Preston
before the cat or if your car is EOBD it will have one after the cat aswell which has the sole purpose of monitoring the efficency of the cat.

best way to check is with a oscilliscope.
 
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