I had an intake and testpipes that were recently replaced back to stock. Afterwards I got a P1273 code. I've checked everything and cant seem to locate a leak or problems. Had the code reset two days ago and then this morning, it came back.

Anyone experience this code? I've search and most were related to FI, which I am not...

 

It's kind of tedious to diagnose. The sensor could have been damaged when it was installed back on the car. Are u using the stock metal exhaust gaskets? Did you check to make sure all the bolts are tight?
That code is for bank 1, passenger side by the way.

 

Ya I'm reusing the stock metal gaskets at both ends. Cant figure out where the leak is, if any. I'll try swapping the o2 sensor tonight.

Are you sure this code is only for the passenger side? Is there a separate code for the driver's side as well?

 

yeah, bank1 sensor1.....its on the manifold. if you did test pipes, you didnt touch the sensor. so unless your manifold has a crack/leak somewhere or you have an intake leak....the sensor is bad.