![P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com](https://www.carparts.com/blog/wp-content/uploads/2021/10/automotive-egr-system-1024x683.jpg)
P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com
![I ran a computor check on a 04 grand cherokee and came up with the code P0155, oxygen sensor heater circuit malfunction. I ran a computor check on a 04 grand cherokee and came up with the code P0155, oxygen sensor heater circuit malfunction.](https://www.justanswer.com/uploads/ebrock63/2008-01-12_192711_o2.png)
I ran a computor check on a 04 grand cherokee and came up with the code P0155, oxygen sensor heater circuit malfunction.
![P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com](https://www.carparts.com/blog/wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2020/08/oxygen-sensor-bank-2.jpeg.webp)
P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com
![P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com](https://cld.partsimg.com/image/upload/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen/images/repc960915_1)
P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com
![P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com](https://www.carparts.com/blog/wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2020/04/oxygen-sensor.jpeg.webp)