bank 1, System too lean Bank 1?

Hi,

The reference to "bank one" is usually used on a v6 or v8 engine. There are two sides to the engine, so they have two banks.

On your vehicle, there is only one bank because it is a 4 cylinder.

Since you have a lean mixture, chances are there is an engine vacuum leak or low fuel pressure. To get you started, here is a link that explains how to check for and repair an engine vacuum leak:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

If no leaks are found, I recommend testing the fuel pressure to confirm the pump is producing what the engine needs to run properly. Here is a link that shows in general how it's done.

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

If you look at the attachments below, they provide the directions specific to your vehicle. Additionally, they include the manufacturer's fuel pressure specifications.

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.