P0138 on chrysler town and country - what is this

Question

What does the code P0138 mean ion a Chrysler Town and Country van - 2004 3.8CC

Answer 1

P0138 -02 sensor bank 1 sensor 2 voltage high

Bank 1 is where cylinder number 1 is located, being sensor 2 this is the downstream sensor or the catalytic monitor sensor. Voltage high means the sensor signal or the return signal are shorted to ground.or the 02 sensor is disconnected, check the mating connection or the harness for proper mating , and harness being shorted together.