So a few months ago I purchased a BBK off road x pipe and I have been running that with a proper MPT tune up until today. Today I put the stock h pipe and cats back on and put the stock tune on the car, after about 10 miles the check engine
light came on. The code was p0135 O2 blank. Do you guys think something is not screwed in all the way? Or is it broken and I will need replacing? Is this something I should take to the dealer? The sensors were plugged into the x pipe not tied up.
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