Codes p0171 and p0174, Evap monitor not set?

Hi,

How many miles was it driven? It may still be in process. Also, if you cleared the codes, did it return? If not, then continue driving it. If there is a problem, the engine light and code should return.

Let me know.

Joe

After I cleared codes did about 130 miles, check engine came on after shutting down and restarting.

It was the PCV valve hose, had a crack in it. I didn't even know it was there.

Hi,

If the light has returned, the issue isn't resolved. A lean fuel mixture can also result from a weak fuel pump. Have you checked the fuel pressure?

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know. Also, let me know if these are the only two codes you have experienced. Just a couple of other questions. You indicated there are no engine vacuum leaks. Are there any exhaust leaks pre-catalytic converter? Are there any misfire issues that could indicate a fuel injector issue?

Let me know. Also, I attached the manufacturer's fuel pressure specifications below. They include the manufacturer's pressure specifications.

Let me know what you find.

Take care,

Joe

See pics below.