"Lambda Sond" light on instrument panel

kim666 · Dec 3rd, 2007, 13:35

Hi, can anyone please help? If you can, it may just prevent cold-blooded murder taking place!!! My husband has a 740 GLT (G reg) and, frequently, the engine will "dip" in power, the Lambda Sond light illuminates on the dash and the engine cuts out. This has happended in the most inconvenient of places (M4, A4, unlit country roads) and is getting to be a nuisance. Because he "loves" his Volvo so much, he maintains it is a "teething" problem (with a car built in 1989, I don't think so) and, god forbid I should ring the RAC!!! The engine does, however, start up again within 5 minutes or so and we head on our merry way with the "Lambda Sond" light still merrily illuminated. Loosening the petrol cap seemed to work for a while, as did removing the air filter. Answers on a postcard please. This just may prevent, at the very least, imminent divorce proceedings! Thanx, Kim.

JIM C · Dec 3rd, 2007, 13:40

Kim, Hello and welcome to the forum.
Best of luck with your technical question.

niloc · Dec 3rd, 2007, 13:56

The lambda light indicates that a fault has been detected by the ECU. First step is to find out the fault codes. Info on doing that can be found here: http://www.volvoclub.org.uk/faq/EngineOBDCodes.html

rogerthechorister · Dec 3rd, 2007, 13:57

Read the codes (method in FAQ)

Fix whatever the codes say to fix.

Clear Codes (method in FAQ)

But I'm not sure if this applies only to Jetronic equipped cars and I think on a G plate you might be a Motronic

Probably clean the usual stuff on the intake side.

CTCNetwork · Dec 3rd, 2007, 14:04

Hi,

This can depend on the state of service of the car.

However, thinks to look at would be sparks (condition), the idle control valves, throttle body, Crank Case Vent system and then see how the car runs..

Searching here for any of the above terms should bring up posts with information for your other half..

Welcome to the forums and do make sure that old Volvo is well looked after..

Des. . .

Dec 3rd, 2007, 13:35	#1
kim666 New Member Last Online: Dec 17th, 2007 12:36 Join Date: Dec 2007 Location: Slough	"Lambda Sond" light on instrument panel Hi, can anyone please help? If you can, it may just prevent cold-blooded murder taking place!!! My husband has a 740 GLT (G reg) and, frequently, the engine will "dip" in power, the Lambda Sond light illuminates on the dash and the engine cuts out. This has happended in the most inconvenient of places (M4, A4, unlit country roads) and is getting to be a nuisance. Because he "loves" his Volvo so much, he maintains it is a "teething" problem (with a car built in 1989, I don't think so) and, god forbid I should ring the RAC!!! The engine does, however, start up again within 5 minutes or so and we head on our merry way with the "Lambda Sond" light still merrily illuminated. Loosening the petrol cap seemed to work for a while, as did removing the air filter. Answers on a postcard please. This just may prevent, at the very least, imminent divorce proceedings! Thanx, Kim.

Dec 3rd, 2007, 13:40	#2
JIM C Forum Support Team Last Online: Jul 4th, 2021 16:28 Join Date: Dec 2003 Location: Scotland View Photos By: JIM C	Kim, Hello and welcome to the forum. Best of luck with your technical question. __________________

Dec 3rd, 2007, 13:56	#3
niloc SWV Benefactor Last Online: Jan 30th, 2013 13:44 Join Date: Dec 2001 Location: Newport, South Wales	The lambda light indicates that a fault has been detected by the ECU. First step is to find out the fault codes. Info on doing that can be found here: http://www.volvoclub.org.uk/faq/EngineOBDCodes.html __________________ Refitting is the reverse of removal???.....Yeah, right!

Dec 3rd, 2007, 13:57	#4
rogerthechorister Rogerthechorister Last Online: Dec 16th, 2023 02:15 Join Date: May 2006 Location: Rochester	Codes Read the codes (method in FAQ) Fix whatever the codes say to fix. Clear Codes (method in FAQ) But I'm not sure if this applies only to Jetronic equipped cars and I think on a G plate you might be a Motronic Probably clean the usual stuff on the intake side.

Dec 3rd, 2007, 14:04	#5
CTCNetwork Forum Support Team Join Date: Dec 2004 Location: Liège, Belgium View Photos By: CTCNetwork	Hi, This can depend on the state of service of the car. However, thinks to look at would be sparks (condition), the idle control valves, throttle body, Crank Case Vent system and then see how the car runs.. Searching here for any of the above terms should bring up posts with information for your other half.. Welcome to the forums and do make sure that old Volvo is well looked after.. Des. . . __________________ Density:- Not just a measurement ~ It's a whole way of Life.! ! ! I drive a Volvo, Please Don't Get In My Way! OldVolvos4Ever He shows up. People die. He vanishes. People should not be afraid of their governments. "He'll deliver more justice in a weekend than 10 years of your Governments should be afraid of their people... "V" courts & tribunals. Just stay out of his way." "I plan to."

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