945 Wentworth/GLE B200FT & Lambda light

cdunlop · Mar 20th, 2006, 17:37

I have a long standing problem. The Lambda light came on and I had the code 1-2-1 in the ecu.
I have 1) Cleaned out the carbon in the Throttle housing so the butterfly shuts
properly
2) Replaced the Air Mass unit with a second hand one and remade the earth connection
3) Replaced the Air Filter in the intake box.
4) Replaced the Lambda sensor
5) Replaced the ecu thermostat in the cylinder head

Each time I have felt a slight improvement but the Lambda light stays on. Now in the last few days I have notice a pungent smell from the exhaust and a, having excessive fuel consumption. I have check the codes and the 1-2-1 is gone and now I get 1-1-3 and 2-3-2 which suggests the car is running rich. This may be nothing to do with my earlier problems, just cropt up now. I may have also knocked something whilst fixing the other problems.
Any suggestions as I am slowly going nuts over this car.
P.S. I replaced the hall/flywheel sensore about 9 months ago.
Chris

Peter Milnes · Mar 21st, 2006, 02:22

You have either obtained the wrong Lambda sensor (not likely) or the catalyser has been damaged by the incorrect fuel ratios that have occurred due to the original MAF sensor fault (indicated by the 1-2-1 code). The pungent smell also suggests catalyser.

All the best, Peter.

Grizlyadams · Mar 21st, 2006, 10:07

Made sure you havent got a vac leak somewhere? a bend in pipe someplace that has a hiden split?? I asume that you reset the ecu (unplug battery) to clear the code/light?
Griz

cdunlop · Mar 26th, 2006, 11:37

Sorry for the late reply. I will certainly try what you suggest. The vacume hoses look a bit dodgy and there are hoses with a plastic (white nylon) Y piece under the inlet manifold (No 4 cylinder by the thermostat just replaced) going to 'something round' on the block that looks like its leaking fuel. My current theory is that I disturbed something on the fuel injection when I did the thermostat.

I confess Peter the Lambda is a Universal type but seems to be the correct one.

Thanks again. See how I get on.

Suterman · Mar 31st, 2006, 08:44

my money is on the cat being blocked up by rich running, this will in turn damage your new sensor, you could take it to a garage and ask them to test the emissions for you, this will give an indication of the state of the cat. (should be aroud 85 quid for a new one off the internet)

Mar 20th, 2006, 17:37	#1
cdunlop New Member Last Online: Jun 17th, 2007 23:57 Join Date: Dec 2004 Location: Sutton, London	945 Wentworth/GLE B200FT & Lambda light I have a long standing problem. The Lambda light came on and I had the code 1-2-1 in the ecu. I have 1) Cleaned out the carbon in the Throttle housing so the butterfly shuts properly 2) Replaced the Air Mass unit with a second hand one and remade the earth connection 3) Replaced the Air Filter in the intake box. 4) Replaced the Lambda sensor 5) Replaced the ecu thermostat in the cylinder head Each time I have felt a slight improvement but the Lambda light stays on. Now in the last few days I have notice a pungent smell from the exhaust and a, having excessive fuel consumption. I have check the codes and the 1-2-1 is gone and now I get 1-1-3 and 2-3-2 which suggests the car is running rich. This may be nothing to do with my earlier problems, just cropt up now. I may have also knocked something whilst fixing the other problems. Any suggestions as I am slowly going nuts over this car. P.S. I replaced the hall/flywheel sensore about 9 months ago. Chris

Mar 26th, 2006, 11:37	#4
cdunlop New Member Last Online: Jun 17th, 2007 23:57 Join Date: Dec 2004 Location: Sutton, London	Thanks Guys Sorry for the late reply. I will certainly try what you suggest. The vacume hoses look a bit dodgy and there are hoses with a plastic (white nylon) Y piece under the inlet manifold (No 4 cylinder by the thermostat just replaced) going to 'something round' on the block that looks like its leaking fuel. My current theory is that I disturbed something on the fuel injection when I did the thermostat. I confess Peter the Lambda is a Universal type but seems to be the correct one. Thanks again. See how I get on.

Mar 31st, 2006, 08:44	#5
Suterman 240 Turbo Last Online: Apr 15th, 2024 22:14 Join Date: Jan 2006 Location: shropshire View Photos By: Suterman	my money is on the cat being blocked up by rich running, this will in turn damage your new sensor, you could take it to a garage and ask them to test the emissions for you, this will give an indication of the state of the cat. (should be aroud 85 quid for a new one off the internet) __________________ 1991 240 Turbo GL 1992 940 GL 1996 940 GLE Turbo Auto 1985 Bedford CF2 B230E

Mar 21st, 2006, 02:22	#2
Peter Milnes Premier Member Last Online: Apr 10th, 2014 00:01 Join Date: Feb 2002 Location: Tonyrefail	You have either obtained the wrong Lambda sensor (not likely) or the catalyser has been damaged by the incorrect fuel ratios that have occurred due to the original MAF sensor fault (indicated by the 1-2-1 code). The pungent smell also suggests catalyser. All the best, Peter.

Mar 21st, 2006, 10:07	#3
Grizlyadams RWD FTW!!! Last Online: Mar 19th, 2019 09:06 Join Date: Dec 2002 Location: Why should i have to tell you! View Photos By: Grizlyadams	Made sure you havent got a vac leak somewhere? a bend in pipe someplace that has a hiden split?? I asume that you reset the ecu (unplug battery) to clear the code/light? Griz

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