2A2F - Bank 2 System Lean
2A2E - Bank 1 System Lean
2EF4 - Coolant Temperature below thermostat regulating temperature
More then likely you have a vacuum leak causing this issue. Here is a guide that will help figure this out:
https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers
If you don't find a leak there is a small chance that the coolant temperature code is causing the issue. However, when the engine is cold the PCM actually delivers more fuel so it is unlikely that a perceived low coolant temperature would create a rich condition. We can't ignore it but I would start with a the guide above.
Let us know what you find. Thanks
Monday, May 4th, 2020 AT 6:35 PM