Hey Guys,
I'm new to the forum world but need some help. I currently have a 2010 Mazda 3GT 2.5 and got a check engine light. Long story short its the P0138 - O2 Sensor Circuit High Voltage Bank 1 Sensor 2. Does anyone know where the sensor is actually located? Do I need to change the other sensor ? ( I know there are two)
Thanks!