As soon as the Ford Transit fault code is displayed, the air conditioner stops working, and the fault code is clear and good. What is this?

As for the problem that the engine fault light is on, I can only help you analyze the cause of this fault because I have never seen a current car. The main reason why the engine fault light is on is that there is too much carbon deposit in the throttle or engine, and the proportion of mixed gas is unbalanced after the oxygen sensor fails, so it is easy to cause the engine fault light to be on. If you drive at a low speed in the urban area for a long time, this phenomenon is easy to appear. Also pay attention to check whether there is any leakage in the fuel injector, which leads to the fuel injector still in the fuel supply state after the throttle valve is closed, which leads to the excessive mixture when driving at low speed, which leads to the unstable idle speed after the fuel is turned off, and even more seriously leads to flameout.