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scharvey 10-03-2011 12:16 AM

Lack of O2 sensors
My son recently purchased an 05 WRX. He believes that it does not have any O2 sensors on it. If thats the case, how can it still run as good as it does? It has an A/M up pipe, down pipe and complete exhaust w/o cats.:confused:

brfatal 10-03-2011 01:12 AM

What makes you think it has no sensors?

basco 10-03-2011 07:23 AM

The car would barely run with both O2 sensors missing

BLAZE2099 10-03-2011 09:47 AM

hes ###### just not seeing the first one.
+ the car more than likely has a tune if its running good still...If not it would idle rough:(

dumdum 10-03-2011 09:48 AM

The main O2 sensor is the front one. It is located on the passenger exhaust manifold before the up-pipe. The car would have DTC's for the missing sensors.

scharvey 10-03-2011 11:01 AM

Thanks guys. I need to investigate further. I didn't think it would run very well at all w/o the sensors. It idles roughly, but above about 2500 rpm's, it's strong and smooth.

It does at least have the sensor in the manifold!

kelvin 10-29-2011 12:37 AM

How can he says that it doesn't have 2O sensors.

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