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940 Lambda Sond warning light 900 1991

uid 6185's pic
posted by  blue940 on  Fri Dec 26 14:58 CST 2003
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last visit: Sat Oct 18 21:11 CST 2014
[RELATED]

Car: 91 940GL sedan B230F & AW71. Bosch LH2.4 FI & EZ116K ignition

Sometimes when I start the car the Lambda sond warning light stays on for up to 10-12 seconds. This happens more frequently when the engine is hot and has been stopped briefly (less than 10 minutes). It did this 3 times in a row this morning. The light will go off by itself after this time or sooner if I tap the throttle. Often it is accompanied by a low idle - around 500 rpm but it never stalls. I have checked the diagnostic unit but there are no fault codes just 1-1-1. Is this a failing oxygen sensor? Weak fuel mixture? What other things are related to this warning light?

Thanks for any advice.

Brad






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