POLO car EPC lights full fault Raiders Volkswagen's electronic throttle will be our traditional sense of the throttle awareness to move forward a big step forward. But in our praise of the public's new technology in the ordinary car on a large number of applications at the same time, we are equipped with electronic throttle cars EPC lights often alarm the problem of interference. Solving this has always been a problem. The fact that we are not really helpless about this problem, but our exploration of this aspect or research is not enough depth.
    Volkswagen's electronic throttle in the many problems, the Shanghai Volkswagen POLO car the most obvious problem. The car's EPC fault lights often light, and sometimes we can not find some real problems, but as long as we clear the fault code, EPC warning light will be a short time off.
    Under normal circumstances can lead to electronic throttle EPC warning light lit the reasons for the following aspects -
    First, the intake system leaks, causing the engine control unit to detect the problem and light the EPC warning light. This situation can also be extended to the engine in the case, do not pull the oil gauge and open the oil filling cover. Otherwise, the engine controller will misjudge the engine inlet air leakage phenomenon, but also a failure, causing EPC lights and engine jitter and other issues. The crankcase ventilation system can also cause this failure if there is a leak. In the above mentioned problems, serious or obvious vacuum leak is not a problem, because we can clearly find such a problem, only a slight leak, the control unit can not be effectively detected, this time is the real problem key, The control unit will receive the oxygen sensor feedback signal to find changes in air-fuel ratio, the actual injection and ignition will be adjusted compensation, the result will make the control unit according to the feedback information made by a series of adjustments are contrary. At this time, the compensation adjustment performed by the control unit will exceed the limits allowed by the control unit. The control unit will determine that there is a problem with the electronic throttle system and the EPC fault lamp is on. However, the actual cause of the EPC lamp in this process is not caused by the functional problems of the electronic throttle control system itself.
    Second, when the EPC lights are found, with the decoder for fault detection, troubleshooting. If the fault code 17550 is found to be lower than the load record value limit; or both the 17550 and 17961 mean that the height sensor suction pipe pressure signal is unreliable (17961P1553 may also be caused by failure of the intake pressure sensor), check the electronic throttle body, Found throttle over dirt, cleaning throttle, do the basic settings 01-04-060.
    Third, this is relatively simple, the engine electronic throttle system components or lines in the real problems, generally through the traditional electrical detection methods to find the problem, do not do here. The only thing we need to emphasize is that the brake switch is an important part of the entire electronic throttle control system, do not ignore the brake switch check.
    Fourth, other comprehensive reasons, the oil should be strictly in accordance with the standard filling, too much oil will affect the concentration of the mixture, resulting in EPC is not normal light; cylinder compression pressure is too low, the same can lead to such failure. Sometimes the above check is no problem, but the EPC fault warning light is still bright, and finally introduced to everyone from the Volkswagen's final solution, if the actual inspection of all the above problems are certainly excluded, then you can solve the following Light on the problem - Refresh the engine control unit.
    Through the above way, POLO electronic throttle EPC lights bright problem can be completely resolved.