30EA - DeNOx Help :-)

320iEvanE92 · 11-09-2024, 12:20 PM

N43B20A - 2007 BMW 320i E92

Codes
30EA - DeNOx Catalytic Converter Sulperhized
2EF5 - Characteristic Field Thermostat, Actuation
2D06 - Air Mass System

Problem
After 15+ minutes of driving, car will suddenly lose power.
There is no acceleration from first gear. It will take about 5-7 seconds to get any sort of speed.
When it's at its worst, the car will violently rock the passengers back and forth, as if there's misfires or limp mode has activated.
This has been an on-going issue for about two weeks now.

Left it with mechanic before I had to take the car back before travelling home, he checked the lambda sensors and I think he also looked at the thermostat and had no luck. After taking it back from him, the engine is struggling to start now. He suggested it may be the fuel pump.

I've done a little research on each code, but not sure where to start. I believe it may be that my CAT is clogged up as I don't frequently drive that many miles at high speeds to clear it out. Don't believe my thermostat code would give me such performance issues.

Currently at about 85000km. Spark plugs last replaced at 55000km. Fuel filter or any coils not replaced AFAIK.

Any tips on where to start?
Thanks!

11-09-2024, 12:20 PM	#1
320iEvanE92 New Member 0 Rep 5 Posts Drives: E92 320i Join Date: Oct 2024 Location: Dublin iTrader: (0)	30EA - DeNOx Help :-) N43B20A - 2007 BMW 320i E92 Codes 30EA - DeNOx Catalytic Converter Sulperhized 2EF5 - Characteristic Field Thermostat, Actuation 2D06 - Air Mass System Problem After 15+ minutes of driving, car will suddenly lose power. There is no acceleration from first gear. It will take about 5-7 seconds to get any sort of speed. When it's at its worst, the car will violently rock the passengers back and forth, as if there's misfires or limp mode has activated. This has been an on-going issue for about two weeks now. Left it with mechanic before I had to take the car back before travelling home, he checked the lambda sensors and I think he also looked at the thermostat and had no luck. After taking it back from him, the engine is struggling to start now. He suggested it may be the fuel pump. I've done a little research on each code, but not sure where to start. I believe it may be that my CAT is clogged up as I don't frequently drive that many miles at high speeds to clear it out. Don't believe my thermostat code would give me such performance issues. Currently at about 85000km. Spark plugs last replaced at 55000km. Fuel filter or any coils not replaced AFAIK. Any tips on where to start? Thanks!
	Appreciate 0 Tweet Quote