The fault code of 21 detection circuit of Daewoo ESPERO

Published:2011/5/17 6:16:00 Author:Borg | Keyword: fault code, detection circuit | From:SeekIC

The fault code of 21 means that the signal voltage of throttle sensor is too high. TPS offers a signal that changes with throttle position, and the normal signal voltage is lower than 1.25v when at idling speed, and the voltage about 4.5V when the throttle is open. TPS is one of the most important input parameters, which is used to control the oil volume and other outputs by ECM. When the throttle is closed, the voltage should be lower than 1.25v, as the throttle is getting wide open, TPS voltage will raise up gradually.



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