W203 CDI P0426 - Catalyst Temperature Sensor Range/Performance Bank 1

Discussion in 'Engine' started by DennisTheMenace, Jun 5, 2014.

  1. DennisTheMenace

    DennisTheMenace Member

    Jul 11, 2013
    west Dorset
    2004 C220 CDi Avantgarde est
    Just had this code come up, car is running no different, looking at cat temp readings they sit around 80-90-100c and fluctuate up and down within these ranges, when driving it goes to 16.9c!

    Is the the o2 sensor in the exhaust that gone **** up?

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