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Is O2 Sensor Really the Problem? 850 1995

posted by  Joe K on  Fri Jun 28 09:52 CST 2002
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I've heard that check engine codes that come back with some sort of O2 sensor difficulty (mine says it's 'slow to respond') can often be caused by a vacuum leak .I'm wondering how often. Just bought this '95 850T with 36K miles on it and the check engine light went on. The mechanic reset it and told me to go for a 'flogging drive', so I spent about a half hour on the highway between 85 and 90 mph. (How fun was that!? It's like your doctor telling you to go out and eat bacon). Anyhow, within two days the light was back on. Before I go out and spend $200 on a front O2 sensor, I'm wondering if there isn't a simpler explanation.
Also, I'm still looking for a Cambridge/Somerville/Arlington indie mechanic. The guys at Auto Bon Imports seem nice and all, but if anyone knows a Volvo god, I'd be open to suggestions.
Thanks for everything.






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