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These codes popped up today and I’m confused what the issue could be . It’s driving perfect . No issues that I can feel while driving . What’s some things I should check? Please let me know your opinion .
Have you cleared codes to see if they come back? There are no auxiliary codes to indicate failures at related sensors, but common components are MAF/MAP, oxygen sensors, injectors, air filters. Running rich may show the downstream O2 sensor running hot. You could check fuel trims to see what the ECU sees that it can’t compensate for. Maybe a leaking injectors, but that would be unlikely to suddenly occur on both banks simultaneously.
Running "rich" could be because MAF transmit values for a higher air volume compared with the real volume Running "rich" could damage your CAT and O2 sensors.
Have you cleared codes to see if they come back? There are no auxiliary codes to indicate failures at related sensors, but common components are MAF/MAP, oxygen sensors, injectors, air filters. Running rich may show the downstream O2 sensor running hot. You could check fuel trims to see what the ECU sees that it can’t compensate for. Maybe a leaking injectors, but that would be unlikely to suddenly occur on both banks simultaneously.
I cleared it yesterday and it didn’t come back until today . Going to work it started shaking and idling bad . How would I diagnose this? Say my O2 sensors how would I know? In my ECU data what should I look for ? I don’t want to give it to a shop if I can do it myself .
Running "rich" could be because MAF transmit values for a higher air volume compared with the real volume Running "rich" could damage your CAT and O2 sensors.
...reading the values of MAF...and somehow interpret over different rpm, chatgbt, etc ...with your equipment by Actual Values on Engine if you don't have access to diagnosis system.
You have most likely a problem with clogged injectors or bad spark plugs I see this on c classes and problems with rotted fuel rail if your not running premium unleaded fuel ⛽
Last edited by MAYBACH W220; Jan 30, 2026 at 03:24 PM.
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