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Re: What's the best instrument to test an O2 sensor?
Posted to Emissions Forum on 12/21/1998 1 Reply

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Hi--Nhan,,,,I will have to agree with you about (How do you use a 4-gas to test an 02 sensor)-- The master tech scanner does have an IM-240 test for testing to see if the system is biased lean or rich... Login to read more.

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