POLO 1.6 suddenly idling high, what's the matter?

Hello, this situation is probably due to the failure of the engine's electronic throttle or the engine's air intake system. This needs a comprehensive inspection.

According to the analysis of the situation, it may be because the idle speed control valve or throttle shaft is blocked and stuck, and it cannot be completely restored; In addition, when the control circuit is short-circuited, open-circuited, or grounded, the engine ECU cannot correctly control the opening of the idle control valve, resulting in poor idle speed.

Then because of ECU failure; Main oxygen sensor circuit; Main relay circuit of EFI; The vacuum leakage of intake pipe may cause the engine idle speed to be too high. Air leakage in the intake system can also lead to high idle speed. I suggest you mainly check the engine carbon deposit, especially the position of the throttle shaft, and also pay attention to check whether there is air leakage in the intake system.

It's best to go to the 4S store to check it with a computer and initialize it at the same time. At the same time, I remind you that it is best to thoroughly check and clean up the carbon deposits every 30,000-40,000 kilometers.