My check engine has been going off for the last couple of day with the code of "Fuel INJ sys left bank:lean"
Has anyone ever had it or knows what does it mean exactly? Can it possibly be fixed if i run a Fuel Injection Cleaner System? Hopefully I won't need to replace injectors or fuel rails. Thanks guys.

 

0210
Diagnostic Trouble Code 0210 points to a problem with the fuel injection system. When the engine management system is running in closed-loop mode the Engine Control Unit (the computer) makes continual adjustments to maintain the air-fuel ratio near the ideal point. To achieve this it relies on signals from many sensors including the Mass Air Flow Sensor and the Oxygen Sensors.

This malfunction is detected when the ECM finds that it cannot properly control the air/fuel mixture, and the mixture is too lean (too much air). DTC 0210 indicates this problem exists on the left bank (the front bank, cylinders 2, 4, and 6). Possible causes include ...
- Intake air leaks
- Front Oxygen Sensor
- one or more fuel injectors on the front bank
- exhaust gas leaks
- incorrect fuel pressure
- lack of fuel
- Mass Air Flow Sensor

 

Is there any way that I could test things like?
- Intake air leaks
- Front Oxygen Sensor
- Injectors
- Exhaust gas leaks
- Fuel pressure
- Mass Air Flow Sensor