P0138 Honda - Odyssey

Question

Bank1 sensor2 located in 2001 Honda Odyssey?

Answer 1

P0138 Secondary H02S (sensor 2) circuit high voltage

P0138 is Bank 1 sensor 2 ,being sensor 2 this makes it a downstream sensor or a catalyst monitor sensor.Being circuit high any code condition that state circuit high this mean inspect the harness of that sensor. What causes circuit high are disconnection either at the sensor harness or the sensor itself.