HLN A55

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Jan 27, 2009
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Hey guys... before I went hunting I thought I might try and trouble one of my more learned corvette owners...

I got an error code that turned on the Check Engine Light... hooked up my diablosport predator and it tells me that the left bank oxygen sensor is failing to communicate. I priced out the sensors for $88 each (might as well change out both while i'm at it I suppose) but I thought a little more carnal knowledge might help before I attempt to locate and change them out...

These are the upstream sensors (i disabled the downstream ones already)...

Are these accessed from the bottom of the car or are they in the exhaust manifolds? (Like I said... I haven't gone hunting yet) :) Any special tools, instructions or other procedure I should be aware of before I tackle this job?

Any help would be great!!

Much appreciated...

T
 

HLN A55

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ps.... I know that they're in either the exhaust manifold or the downpipe... just not sure exactly if they're access from the engine bay or under the car... thanks
 

Riley P

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First, I would check to see if it is plugged in.:D
 

Russ K

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The upstream O2 sensors are in the exhaust manifold, and are accessed from under the car. You might have to heat the manifold with a acetylene torch to remove the O2's, as they can be seized.

Russ Kemp
 

HLN A55

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are they pretty accessible or am i going to need a universal joint for my ratchet? am I going to need a special socket for my ratchet too?
 

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