Process for diagnosing the end stage of a heating device of a gas sensor comprises using a prescribed diagnosis value as a sensor condition signal and/or a prescribed diagnosis value of a heating voltage parameter signal

摘要

Process for diagnosing the end stage of a heating device of a gas sensor comprises using a prescribed diagnosis value as a sensor condition signal and/or a prescribed diagnosis value of a heating voltage parameter signal by which the temporary change of heating voltage is characterized. An independent claim is also included for a device for diagnosing the end stage of a heating device of a gas sensor. Preferred Features: A temperature diagnosis signal is used as the sensor condition signal by which temperature values of the sensor are characterized. A sensor signal, optionally an oxygen or NOx signal, characterizing the exhaust gas is preferably used as the sensor condition signal.