I had the code checked (P0135 )O2 heater sensor malfunction sensor 1 bank 1. Is that the driverside befor the cad convertor? and if so...could the fact that my exhaust manifold has a hairline crack be the cause for the code?

 

Hey guy, I did a search cause I have the same problem and it is the passenger side. Lucky us they say it is the easiest one to get to. Before the cat you can see it looking down in the engine bay on the passenger side. I think it is a 12mm wrench???

-Bryan

 

you can buy a tool specifically for O2 sensors at Advanced auto parts or which ever auto part store is near you. It's like $12 or something.

 

I remember when i was a kid workin in my dads shop he'd stick a jumper wire in the the thing. will this or maybe a ressistor effectively bypass the thing?

 

I'd just replace both of your upstream O2 sensors. I had mine done not too long ago. From what I've read, the upstream sensors are the ones that will throw codes and take the readings. The downstream are not as important as I understand it. How many miles are on your truck? I know many have over 100K miles on their trucks and are still running their original sensors but if you are getting a code on them I'd replace yours. Mine too were fine and not reading any codes. I just replaced them as recommended from Troyer Performance after I had my truck custom tuned.

 

I just got the p0135 code too, was it a bad sensor or was it unplugged?