Bank 1 lean. Can a loose 02 sensor cause this code? ( just put on a h pipe about 250 miles ago) and is this the driver side or passenger? Ty!
P0171 code
- Thread starter WicK
- Start date
Bank one should be the passenger side. A lean code like that could very possibly be a exaust leak. Very possible your new h pipe wasn't installed correctly.
Definitely easy to start with the recent mods.
Guys with long tubes probably know they are a regular maintenance item.
How many miles on your O2 sensors?
And for those running long tubes, while you can pull the harness to allow the stock drivers side bank 2 sensor from a 6.2 F-150 Raptor is cheaper and longer and what I’ve ran the last 2 years.
-J
Guys with long tubes probably know they are a regular maintenance item.
How many miles on your O2 sensors?
And for those running long tubes, while you can pull the harness to allow the stock drivers side bank 2 sensor from a 6.2 F-150 Raptor is cheaper and longer and what I’ve ran the last 2 years.
-J
Retighten the bolts down more? Including the o2 possibly? And ty for thr input!
Yes. I would loosen h pipe bolts, make sure h pipe is adjusted and seated correctly, then retighten. Check 02 sensors and make sure they are tight as well.
Thanks all! So frustrating lol. I will check k this stuff out tomorrow!
From pbd remotely. First tune was with jlt 123mm with the h pipe. Everything went well. Loaded up new tune with the 2.4 pulley, tb, and plugs and this started to happen. When I replaced the drivers side (I now know its the passenger side,, my own fault for not researching enough) I retightend the bolts that go the manifolds (maybe not enough) or i will just back then out and adjust it better as I tighten the h pipe back down and tighten them down more so. Didnt hear any leaks but maybe there is. I had to retap the bung on the passenger side o2 bung cause the o2 wasn't threading in correctly.
Only 11k on the o2s. Car only has 113xx miles on it
Just wanted to update everyone on this. It turned out to be a loose h pipe to manifold on the passenger side. Once tightened up no more check engine after resetting. Hope this helps anyone in the future.
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