p0138 error code

Question

Replaced 02 sensor but still receiving error code p0138. what would you recommend checking next?

Answer 1

HI there,

This code is set when either there is to much voltage sent from the sensor back to the computer or the voltage doesn't switch.

Check for shorts in the wiring harness, at the connector. Look for any areas where the insulation has been rubbed off the wire so it could be shorted to ground.