940 lambda and catalyst replacement - Page 3

Stephen Edwin · Nov 11th, 2018, 12:30

Hello Ian.

You have welcomed the emailed green book as bed time reading. So you will soon know a lot more than me about this LH 2.4 stuff. Cushti.

I am puzzled why you are concentrating on the carbon issue re replacing the Lambda sensor and possibly the cat. The message I am getting from informed people is that both those components might well be OK still. I think that is why people are answering issues associated to your actual specific question.

I have the B200F and am very interested to hear the outcome of your situation.

ovlof236 as I just said I have the B200F myself and that is interesting. ALthough rather out of my depth. Thank you.

Ian Fife · Nov 11th, 2018, 15:43

Stephen - email sent

Ian F

lynns hubby · Nov 12th, 2018, 16:49

[Another time my O2 sensor stopped working, lumpy drive, down on power in a rainstorm on the way to a day's work, which wasn't nice.
After unplugging and re-routing the O2's wire it started working fine again and everything went back to normal. Wierd stuff.

I had a similar problem years ago with our Wentworth B200FT Engine playing up and lambda light on in wet weather. Took it to a Bosch tuning specialist and explained the issue but as you can guess it did not play up when they put the diagnostics on the vehicle.
I asked him to spray under the car with a water hose but they said they were not allowed to.
Brought car home in dry, it ran perfect. While it was still idling, I got hose out on my drive and sprayed underneath the car and it started running rough and the light came on.
Got a new Lambda the next day and fitted it and never had another problem.
Turned out that the insulation on the wiring was breaking down and the water was shorting things out.

Stephen Edwin · Nov 13th, 2018, 11:27

Ian as I understand it you have replaced the Lambda sensor and your car is running well. I am pleased. That is Cushtie!

I don't pretend to understand LH 2.4 stuff. I don't know the step by step by which you reached your diagnosis.

To be very technical I wonder if your LH 2.4 had a temporary glitch which you have re-set. But I really do not understand this stuff.

Very best wishes for you and your car.

Ian Fife · Nov 15th, 2018, 07:42

update for anyone interested:

Lambda sonde arrived from Germany (Bosch OE item), fitted in about 10 minutes (old sonde was already out) and the car started and ran fine. No Lambda light on the dash, and no fault codes stored in the OBD1.

So everything the OBD1 was telling me was correct - what I needed was a new lambda sonde.

Ian F

Nov 12th, 2018, 16:49	#23
lynns hubby Master Member Last Online: Apr 5th, 2024 09:25 Join Date: Oct 2011 Location: Great Yarmouth	[Another time my O2 sensor stopped working, lumpy drive, down on power in a rainstorm on the way to a day's work, which wasn't nice. After unplugging and re-routing the O2's wire it started working fine again and everything went back to normal. Wierd stuff. I had a similar problem years ago with our Wentworth B200FT Engine playing up and lambda light on in wet weather. Took it to a Bosch tuning specialist and explained the issue but as you can guess it did not play up when they put the diagnostics on the vehicle. I asked him to spray under the car with a water hose but they said they were not allowed to. Brought car home in dry, it ran perfect. While it was still idling, I got hose out on my drive and sprayed underneath the car and it started running rough and the light came on. Got a new Lambda the next day and fitted it and never had another problem. Turned out that the insulation on the wiring was breaking down and the water was shorting things out. Last edited by lynns hubby; Nov 12th, 2018 at 17:12. Reason: Added last sentence

Nov 11th, 2018, 12:30	#21
Stephen Edwin Premier Member Last Online: Oct 26th, 2023 20:42 Join Date: Jun 2010 Location: Thurrock	Hello Ian. You have welcomed the emailed green book as bed time reading. So you will soon know a lot more than me about this LH 2.4 stuff. Cushti. I am puzzled why you are concentrating on the carbon issue re replacing the Lambda sensor and possibly the cat. The message I am getting from informed people is that both those components might well be OK still. I think that is why people are answering issues associated to your actual specific question. I have the B200F and am very interested to hear the outcome of your situation. ovlof236 as I just said I have the B200F myself and that is interesting. ALthough rather out of my depth. Thank you.

Nov 11th, 2018, 15:43	#22
Ian Fife Senior Member Last Online: Today 08:57 Join Date: Jan 2006 Location: Inverkeithing	Stephen - email sent Ian F

Nov 13th, 2018, 11:27	#24
Stephen Edwin Premier Member Last Online: Oct 26th, 2023 20:42 Join Date: Jun 2010 Location: Thurrock	Ian as I understand it you have replaced the Lambda sensor and your car is running well. I am pleased. That is Cushtie! I don't pretend to understand LH 2.4 stuff. I don't know the step by step by which you reached your diagnosis. To be very technical I wonder if your LH 2.4 had a temporary glitch which you have re-set. But I really do not understand this stuff. Very best wishes for you and your car.

Nov 15th, 2018, 07:42	#25
Ian Fife Senior Member Last Online: Today 08:57 Join Date: Jan 2006 Location: Inverkeithing	update for anyone interested: Lambda sonde arrived from Germany (Bosch OE item), fitted in about 10 minutes (old sonde was already out) and the car started and ran fine. No Lambda light on the dash, and no fault codes stored in the OBD1. So everything the OBD1 was telling me was correct - what I needed was a new lambda sonde. Ian F

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