Dunno about cleaning, or at least haven't found any way that will work and not mess things up more than it helps.
You can bench test the sensor by using the multimeter and a propane torch.
Red lead on the sensor wire, black lead connected to the sensor body, put heat to the bit that sticks into the exhaust flow and the voltage output will change markedly, then return to the original reading as it cools.
You can bench test the sensor by using the multimeter and a propane torch.
Red lead on the sensor wire, black lead connected to the sensor body, put heat to the bit that sticks into the exhaust flow and the voltage output will change markedly, then return to the original reading as it cools.
