over the weekend I installed the helix 02 housing and got the cel light.I have a hiflow cat so I took it off and put the stock cat on and the cel is still on. wtf !!!! I heard that if you spray the o2 sensor with penetrant you can damage it do you think my front sensor is bad? The car won't let me rev past 4500k when Iam driving?? ANY IDEAS?? THANKS!!

 

did you disconnect the battery to reset the ecu?

 

yeah, it goes away for 2 seconds...pops back on.

 

Bump..

 

sounds like o2 sensor go to local auto zone and the will check the cell for free if you dont know someone in a garage??

 

You won't know what to fix until the code is identified...