Honda Fit fuel system is too lean b 1

The fuel system is too lean, that is, the exhaust gas content detected by AF sensor is lower than the program value, which is generally caused by insufficient fuel pressure or abnormal sensor itself. Oil circuit is the first range of troubleshooting. Simple fault, simple treatment: find 4S to adjust the air-fuel ratio. The air-fuel ratio is specially in charge of this matter, so it is not troublesome to adjust it. But you have to use the computer to adjust it.