| 摘要 |
A method for diagnosing a reading ( 10, 12 ) or the sensor ( 106, 110 ) delivering the reading, whereby the sensor ( 106, 110 ) is spatially and/or functionally associated with an exhaust gas catalytic converter unit ( 108 ) which is arranged after a combustion engine ( 100 ) and a device functioning according to the method are provided, whereby a first reading ( 10 ) from a first sensor ( 106 ), arranged before the exhaust gas catalytic converter unit ( 108 ) in the flow direction of the exhaust gas and a second reading ( 12 ) from a second sensor ( 110 ), arranged after the exhaust gas catalytic converter unit ( 108 ) in the flow direction of the exhaust gas, is processed, whereby a special operating state of the combustion engine ( 100 ) is awaited or induced and, upon reaching the special operating state, it is monitored whether the first and second reading ( 10, 12 ) fall below a first threshold value ( 16 ) within a predetermined or predeterminable first time span ( 18 ).
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