Method for checking at least three sensors which detect a measured variable in the range of an internal combustion engine

It is a method for checking at least three sensors (191, 192, 193, 194, 195) proposed that detect a measured variable in the range of an internal combustion engine (100). A measure of the sensor signal (S1, S2, S3, S4, S5) of the to be tested each sensor (191, 192, 193, 194, 195) is supplied with a reference signal (M, S1, S2, S3, S4, S5) compared , which is obtained from at least a portion of the sensor signals (S1, S2, S3, S4, S5) to be checked sensors (191, 192, 193, 194, 195). A sensor (191, 192, 193, 194, 195) is detected as being faulty by comparing the measure of the sensor signal (S1, S2, S3, S4, S5) (with the reference signal M, S1, S2, S3, S4, S5). The reference signal (M, S1, S2, S3, S4, S5), for example from a mean value (M) of a measure of the sensor signals (S1, S2, S3, S4, S5) at least a portion to be checked sensors (191, 192, 193, 194, 195) is formed, wherein the individual sensor signals (S1, S2, S3, S4, S5) in the case of averaging by means of correction factors (K1, K2, K3, K4, K5) can be weighted differently. The sensors (191, 192, 193, 194, 195) are for example temperature sensors or pressure sensors in a suction area (105) of the internal combustion engine (100) to the internal combustion engine itself, in an exhaust area (110) and / or (in an exhaust aftertreatment system may be arranged 115).