Gmc terrain 4cyl 2010 p0138 p0140 ?

Question

I changed the 02 sensor bank one sensor 2 and reset the car but the faults still the same
And there is no gas leakage
Plz can you help me?

Answer 1

Hi there,

I would suggest checking the wiring. If this is fine, here is a list of other possible causes.

P0138 GMC - HO2S Circuit High Voltage Bank 1 Sensor 2

Read more: https://www.autocodes.com/p0138_gmc.html