Bmw 2c31 Dme Oxygen Sensor Emissions Control

However my DME is throwing the code - 2C31 - Oxygen sensor emission control. This code is only seen in the MHD app, it does not trigger any dash lights (I have found great threads in regards to this issue but would prefer to pass emissions now and deal with codes with time). Hey all, I've got a soft check engine light on and its pulling the following codes 2c31/not present - DME Oxygen Sensor emissions control 604e/present - RDC system 6051/present - RDC: RDC transmitter; rear left A559/not present - Instrument cluster power supply switched off Is 2c31 most common with a bad O2 sensor? And would "not present" mean the DME isn't reading it as being there at all? I.

Chasing an emission problem (error 2C31) - CEL is triggered Jump to Latest 965 views 6 replies 2 participants last post by bmw4te Feb 9, 2025 B. Hi all, I keep getting a 2C31 code - DME: Oxygen sensor control on my N54 MHD tuned 3 series. I just replaced my pre cat o2 sensors and that got rid of a code I was getting alone with the 2C31 (2C27 o2 before cat system check).

I have 2009 BMW X5 with N52 engine and 151k miles. Check engine light is on and getting '2C31 Lambda probe in front of catalyst, trim control' error. 2C31 - P2097 Information saved in DME Fault code 2C31 - P2097 Fault text Oxygen sensor before catalytic converter, trim control Fault description Post Catalyst Fuel Trim System Too Rich (Bank 1) Condition for fault identification Test condition: O2 sensor trim control No fault memories Drive at 50 - 80 km/h and at moderate engine speed.

Terminal condition: Terminal 15, engine on Voltage. Code 2C31 indicates catalytic converter efficiency below threshold, often due to physical damage or missing parts. The accompanying O2 sensor code suggests faulty sensors or wiring issues.

« Previous Thread Next Thread 2C31 DME Code - MHD Stage 2 + Emissions. 2C31 code 04:11 PM 2C31 code. I have seen a few examples of BMW vehicles with the N52 and N51 engine that consistently set the 2C31 Oxygen sensor before catalytic converter 1, trim control or P2097 Post Catalyst Fuel Trim System Too Rich (Bank 1) and/or 2C32 Oxygen sensor before catalytic converter 2, trim control or P2099 Post Catalyst Fuel Trim System Too Rich (Bank 2).