Is the etc light in the car related to the engine oil?

Hello, there is a leak in the air intake system, which causes the engine control unit to light the EPC warning light after detecting the problem. This situation can also be extended to the situation when the engine is started. Do not pull out the fuel gauge or open the fuel filler cap. Otherwise, the engine controller will misjudge the air leakage at the engine air inlet, and at the same time, it will also cause a fault, which will lead to the EPC light being on and the engine shaking. If there is a leak in the crankcase ventilation system, this fault may also be caused.

Among the problems mentioned above, serious or obvious vacuum leakage is not a problem, because we can obviously find such problems. The control unit cannot effectively detect a slight leak. This is the real problem. The control unit will find the change of air-fuel ratio concentration because it receives the feedback signal from the oxygen sensor, and will adjust and compensate the actual fuel injection and ignition. In this way, a series of adjustments made by the control unit according to the feedback information will run counter to each other. At this time, the compensation adjustment made by the control unit will exceed the limit allowed by the internal program of the control unit, the control unit will judge that there is a problem with the electronic throttle system, and the EPC fault light will light up. However, the actual reason why the EPC light lights up in this process is not caused by the functional problems of the electronic throttle control system itself.

When the EPC light is found to be on, use the decoder to check the fault and eliminate it. If it is found that the meaning of fault code 17550 is lower than the limit value of load record; Or the pressure signal ratio of the suction pipe of the height sensor is unreliable (which may also be caused by the failure of the inlet pressure sensor) and has the meanings of 17550 and 1796 1 at the same time. Check the electronic throttle body, clean the throttle if it is too dirty, and then make basic settings.

This is relatively simple. The real problems in various components or circuits of engine electronic throttle system can generally be found by traditional electrical detection methods, so I will not introduce them here. The only thing that needs to be emphasized is that the brake switch is an important part of the whole electronic throttle control system. Don't ignore the inspection of the brake switch.

For other comprehensive reasons, the engine oil should be filled strictly according to the standard, and too much engine oil will affect the concentration of mixed gas, resulting in abnormal lighting of EPC; Too low cylinder compression pressure can also lead to such failures. Sometimes there is no problem with the above inspection, but the EPC fault warning light is still on. Finally, I will introduce you to the final solution from the public. If the above problems are definitely eliminated after actual inspection, then the problem of lighting can be solved in the following ways.

I hope I can help you!