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1997 c280 w202 hfm/sfi ecu dtc 13

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Old Mar 29, 2017 | 07:31 PM
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Default 1997 c280 w202 hfm/sfi ecu dtc 13

Hi. I am getting the above error code off pin 4 of the 38 pin analog connector on my 1997 C280 . I know it is telling me that the O2 System is running rich or lean but how do I fix this issue.
The car can take 5 seconds (turning over) to start when it is hot. It sounds hesitant after it starts then it will spring to life within 4 seconds ±. After that it operates normally.

On a 366 km trip it achieved 10.5 Litres per hundred kilometers. The book says it should be around 8.8 L/100

What do I look for now to fix DTC 13?
 
Old Apr 25, 2017 | 07:21 PM
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Is it fair to suggest this code is being tripped by the Pre Cat O2 sensor?
 
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