I linked the diagram in the first post at the bottom.
The second line is not a misprint by the way and no leaks in the headers.
There is a big discussion regarding this on a nissan forum. Here is the link...
Okay, here are the 4 DTC's right after the header install:
P1148 = closed loop bank 1
P1148 = closed loop bank 1
P1283 = A/F ratio lean
P1031 = A/F Ratio Sensor Meter
A lot of modifications have been done in attempt to fix this issue. Different codes kept coming up so no luck there. I posted...
I will get those DTC values and post when I get a chance.
The thing is that a pre-catless Y-pipe with stock exhaust manifold does not throw MIL. The downstream o2 sensors are in place with o2 simulators so it fixes that issue.
But the same setup with aftermarket performance headers will throw...
I would like some advice on how to tackle this issue.
After installing aftermarket exhaust manifolds on an 06 Nissan Altima 3.5L Automatic, A check engine light came on.
All stock 2005+ model altimas have 2 wideband (5 wire bosch) primary AF sensors attached to the exhaust manifolds, which are...
