Quote:
Originally Posted by ShibaYuki
Oh no. Please tell me that's not the problem. The p0171 is showing on the OFT ECU fault codes. Then I just erase it there. I'm not actually getting the engine light in the car. Just checking if there's like a hidden ECU fault codes. The front o2 sensor is actually snug in there. It's not moving and it's screwed in all the way. Although, the washer for the primary o2 sensor is a little loose, but the actual sensor itself is really in there, wont get unscrewed unless I unscrew it.
|
usually if the washer is loose its not in all the way and it may be leaking.
I had to chase the threads on my ofh ( same with many headers as when the bungs are welded in they distort a bit) to get the o2 sensor to screw in properly without forcing and so they go in all the way. Even a small leak right near the sensor will cause issues as the sensor sees fresh air with heaps of oxygen and it thinks car is running lean when its not.
If you have not removed the front 02 sensor I would do so then run a tap/chaser through bung then reinstall sensor its M18 by 1.5 pitch
if the sensor is not screwed in all the way it wont work properly either.
check the threads on front o2 sensor for damage as well.
luckly you can get at the front 02 without uninstalling header