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Check engine light on my 02 Expedition (4.6), idling rough, bad hesitation sometimes esp. when cold.
Code P2195, O2 sensor.
I found a disconnected vacuum line, reconnected it but made no difference. Before reconnecting the line, also had P0132
I don't know whether to replace the O2 sensor, or keep looking elsewhere- hoping this live scan might help someone way more knowledgeable than I...