What is system to leanat idle bank 1 Volvo s60 2005?

"System too lean at idle bank 1" means that the engine is not receiving enough fuel relative to the amount of air entering the engine. This can cause a variety of problems, including:

- Engine knocking

- Engine stalling

- Reduced fuel economy

- Increased emissions

There are a number of possible causes of a system too lean at idle bank 1, including:

- Faulty oxygen sensor

- Vacuum leak

- Dirty fuel injectors

- Clogged fuel filter

- Faulty fuel pressure regulator

To troubleshoot a system too lean at idle bank 1, you will need to:

1. Check the oxygen sensor.

2. Check for a vacuum leak.

3. Check the fuel injectors.

4. Check the fuel filter.

5. Check the fuel pressure regulator.

Once you have identified the cause of the problem, you can then take steps to correct it.