does a 2006 HHR with a 2.2 engine and manual tranny have an upstream O2 sensor.?? was recently under the car doing some work and can only see a downstream O2 sensor....downstream of the cat.....

 

The last 06 2.2 I changed the downpipe and it had an O2 sensor in the exhaust manifold it self not the pipe upstream of the cat.

 

ok...so looks like the upstream one's in the manifold.....didnt look there....just saw the downstream one in the pipe after the cat......kinda know that there's gotta be two....not that either one's gotta be hanged but the day may come......thanks.....