What is the meaning of OBD-II p1131 ford code , and what are the possible causes and how to solve this issue?

OBD-II code P1131 indicates a problem with the "Bank 1, Sensor 1 Lean Exceeded" in your Ford vehicle. This means that the engine control module (ECM) has detected that the air/fuel mixture in the engine's cylinder bank 1 (the side of the engine that contains cylinders 1, 2, 3) is running lean, meaning there is too much air and not enough fuel. Possible causes of P1131 code include: Faulty Oxygen (O2) sensor Vacuum leaks in the intake system Dirty or clogged Mass Air Flow (MAF) sensor Fuel pressure problems Faulty fuel injectors To solve this issue, you can try the following steps: Check and repair vacuum leaks in the intake system Clean or replace a dirty MAF sensor Check fuel pressure and replace the fuel pump if necessary Replace a faulty O2 sensor Inspect fuel injectors and replace if necessary. If the problem persists, it's recommended to have a mechanic diagnose and repair the issue, as further inspection may be needed to accurately diagnose the root cause of the P1131 code.