**I've searched...I can't find anything**

Anyone have both of these codes pop at once? If you did, what fixed it? I've replaced both 02 sensors and they're still there.

For context/history, I bought the car with a tune on it from Eurocharged, and when I upgraded the s/c pulleys from Velocity AP, I had a new tune from them installed. This tune uncovered a P0420 code that the Eurocharged tune was somehow hiding. Me being me, instead of replacing the cat, I replaced the manifolds with headers from Ardent and had the tune from Velocity AP adjusted for the high flow cats. The P0420 code disappeared and now the P0133 and P0153 codes are here. When I had the headers installed, I had new Jag 02 sensors installed. Thinking these might somehow be bad, I just replaced them with the Bosch equivalent and the codes returned. The sensor location moved from just below the exhaust manifold to the end of the headers, which is probably about 2 feet further down the pipes. While not insignificant, I don't see how this new location would pop the code, but I guess it might be possible.


I'm also now seeing a P0170 code, so I guess it's time to start looking at MAF sensors and maybe even smoke the intake to look for leaks.

 

Update...The P0170 was a permanent code and after replacing the 02 sensors it has gone away. The P0133 and P0153 are both still present tho.

 

you still may have a exhaust leak