P17559 - Long Term Fuel Trim to Lean Bank 2
These codes indicate that the engine control unit (ECU) has detected that the air-fuel mixture is too lean in one or both banks of the engine. This can be caused by a number of factors, including:
* A vacuum leak in the intake system
* A faulty fuel injector
* A clogged fuel filter
* A faulty oxygen sensor
* A faulty ECU
To diagnose the cause of these codes, it will be necessary to inspect the fuel system and the intake system for leaks or other problems. The fuel injectors and oxygen sensors should also be tested to ensure that they are functioning properly. If any of these components are found to be faulty, they will need to be replaced.
In some cases, these codes may be caused by a temporary issue, such as a low fuel level. If this is the case, the codes may go away on their own after the fuel tank is filled. However, if the codes persist, it is important to have the vehicle diagnosed and repaired as soon as possible.
