Get P0138 and P0158. Replaced the plugs no exhaust leak on my 2006 Jeep Liberty 3.7L

Question

I get the engine codes P0138 and P0158. Replaced the plugs no exhaust leak on my 2006 Jeep Liberty 3.7L

Answer 1

Hi there,

These codes are for the heater circuits in the bank 1 and bank 2 rear heated O2 sensors. Since both are failing, I would look for a common problem with the wiring to the heater circuits.

Answer 2

P0138 JEEP Code - O2 Sensor 1/2 Circuit High
Read more: https://www.autocodes.com/p0138_jeep.html

P0158 JEEP Code - O2 Sensor 2/2 Circuit High
Read more: https://www.autocodes.com/p0158_jeep.html