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Lambda Light - where to start troubleshooting? S70

posted by  tina on  Wed Dec 20 12:18 CST 2006
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last visit: Thu Nov 24 09:34 CST 2011
[RELATED]

I suspect it might be the O2 sensor, I was thinking of replacing those with the last tune up but did not. Is it a DIY job?

Klaus, the air pump definitely comes on - always sounds like a vacuum cleaner turned on when idling, that it has done for the past 2 years so i assume it is the normal sound.






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