CEL HELP?
Thread Starter
Junior Member
Joined: Mar 2022
Posts: 52
Likes: 7
C63s W205
CEL HELP?
Receiving codes P2097 & P0420 on my Stock C63s , i have seen some of you post these same codes but after running DP. Was wondering what would be causing this on a stock car? Thanks
Out Of Control!!
Joined: Apr 2019
Posts: 12,003
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
troubleshoot vs. swap...
The last thing you'll want to do is replace a new cat to find out... "same difference!"
Changing or swapping L/R sensors a pretty good idea to exercise connectors.
How are the fuel trims:
trustable in-line -Or all the way near bad??
(All these parts should be replaced in pairs to keep the banks near balanced)
Thread Starter
Junior Member
Joined: Mar 2022
Posts: 52
Likes: 7
C63s W205
Your ECU is flagging a cat as questionable. That says rich mixture is not reduced as expected...
The last thing you'll want to do is replace a new cat to find out... "same difference!"
Changing or swapping L/R sensors a pretty good idea to exercise connectors.
How are the fuel trims:
trustable in-line -Or all the way near bad??
(All these parts should be replaced in pairs to keep the banks near balanced)
The last thing you'll want to do is replace a new cat to find out... "same difference!"
Changing or swapping L/R sensors a pretty good idea to exercise connectors.
How are the fuel trims:
trustable in-line -Or all the way near bad??
(All these parts should be replaced in pairs to keep the banks near balanced)
Thread Starter
Junior Member
Joined: Mar 2022
Posts: 52
Likes: 7
C63s W205
Your ECU is flagging a cat as questionable. That says rich mixture is not reduced as expected...
The last thing you'll want to do is replace a new cat to find out... "same difference!"
Changing or swapping L/R sensors a pretty good idea to exercise connectors.
How are the fuel trims:
trustable in-line -Or all the way near bad??
(All these parts should be replaced in pairs to keep the banks near balanced)
The last thing you'll want to do is replace a new cat to find out... "same difference!"
Changing or swapping L/R sensors a pretty good idea to exercise connectors.
How are the fuel trims:
trustable in-line -Or all the way near bad??
(All these parts should be replaced in pairs to keep the banks near balanced)
car also feels a bit sluggish after these CEL , but it might be the hot summer weather not sure.
