My check engine light came on and gave me this code P0135 bank one. Which I believe is the 02 sensor in the exhaust manifold. I recently replaced the 02 sensor and I cleared the code but came on again. This all started when I installed a hi flow cat. Is there anything I can do to remove the check engine light?

 

The Code P0135 is: o2 Sensor Heater Circuit Malfunction check the depth of the inner portion of the hi flo cat.. i had a problem with in the inner depth was bending and damaging the prong maybe that might help

 

how do I check the inner depth of the hi flow cat? what am I looking for? What do u do to fix the problem?