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

Joined
Jul 11, 2013
Messages
36
Location
west Dorset
Car
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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