Chrysler Repair: DTC: P0138, chrysler 300m special, 2004 chrysler 300m

Question
ENGINE LITE COMES ON PO138 ON 2004 CHRYSLER 300M SPECIAL WHAT IS THE DISCRIPTION AND/OR WHERE CAN I FIND OUT THE DESCRIPTION OF CODE PO138

Answer
Hi Michael,
That code says the downstream oxygen sensor on the right side, rear of catalytic converter is showing a voltage that is high, suggesting it is shorted to the supply voltage. So check that its wires are not shorted together, and if not then replace the sensor.
Roland