P2099 Diagnostic Trouble Code Discussion for July 2022
Downstream Fuel System Rich - HO2S-22 (Bank 2 Sensor 2)
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| Help Request | Posted | |
| 2012 Mercedes-Benz E350 3.5L MIL Lamp on VIN: WDDHF5KB7C P2099: The mixture is too rich downstream of cat bank 2. So, I've got this car with the above codes. The problem that I see is that my front O2 sensor values never change.They are stuck at -.02 L&R (slightly rich). If I raise the engine speed to 3000 rpm or so and let off the gas the rear O2 sensors respond ... |
July 22, 2022 |
