2018 Pilot with 33K miles showed a CEL and displayed an emission and AWD system problem on the dash. Dealer found P0171 and P0174 and replaced the fuel pump. After reset and a short test drive, the same errors popped up on dash. After the fuel pump swap dealer says there were no error codes showing and suggested to return for a valve clearance procedure. I did some basic things like check for air leaks and clean the MAF sensor. I reset after cleaning the MAF but a few days later he CEL came back on.

I scanned it myself and got P0171 (system too lean bank 1) and P0174 (system too lean bank 2). The dash shows emissions system and AWD system problem light. I contacted Honda of North America and they just replied that they "were unable to find any open campaigns pertaining to this matter (e.g., safety recall, warranty extension or product update)." We bought the car in the US but moved overseas, and the country we are in only has a few Honda service centers so our choices are limited. I tried taking it to a general non-Honda shop but they are reluctant to work on it because it is a more complicated issue that they believe should be handled by Honda.

I could be paranoid, but it now sometimes seems there is a slight hesitation when the vehicle shifts from 2nd to 3rd gear when accelerating. We normally drive it in 'eco mode' but that gets disabled when the CEL comes on.

The service center still thinks that we now need a valve clearance check after they replaced the fuel pump. I did mention the MAF sensor, oxygen sensor, and fuel injectors as other potential causes but they seem to think the valve clearance check is needed. I am losing faith after they originally assured me the fuel pump was the issue.

Appreciate any help or suggestions!