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Re: O2 and/or AF Sensors - read scan tool or probe them?
Posted to Technical Theory Forum on 4/9/2014 4 Replies

You do not need a $700.- current transducer to check those sensors.

You can connect across the AFS + and - lines with an oscilloscope set to a something like 1mV/div. Yes, you need to suppress the 0.3 - 0.4 V across the sensor. If your scope can do so, t... Login to read more.

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