Today the CEL came on so had the van scanned and the result was P0156, P0161 and P0401. I know the first two re related to the bank 2 oxygen sensor and the 401 is related to the EGR system and an insufficient flow.
Since the mechanic took down the whole exhaust pipe including the cat converters I was thinking that he might had messed something else apart from the pipe not fitting well on the exhaust manifold so I took a quick look under the van and I could see the blue connector of the oxygen sensor hanging loose so I will lift the van and will plug it in tomorrow; that should take care of the P0156 and P0161 codes.
Taking into account the fact that the mechanic is an jackass, is there any other thing he might have forgotten and it's causing the P0401 code?, I guess there must be some connection form the exhaust to the EGR, is it a hose or a pipe?, should it be accessed from below the van?, any other ideas?.
Finally could the EGR code be causing the van to sometimes feel like it's engine braking and some rough shifting?.
Thanks in advance.