O2 sensor code P0155

Reply Subscribe

Thread Tools

Search this Thread

Sep 11, 2024 | 01:42 PM

Dhalas818

Thread Starter

Amateur

Joined: May 2020

Posts: 44

Likes: 0

O2 sensor code P0155

I've had the sensor replaced along with the crank sensor on my 2008 Ram 1500 3.7 STX and the engine light comes back on for same code. Anyone else have this issue that can help me find the problem. Thanks!

Sep 11, 2024 | 06:08 PM

HeyYou

Administrator

Joined: Apr 2010

Posts: 87,268

Likes: 4,197

From: Clayton MI

Which sensor did they replace? That code is for bank 2, heater circuit. Have you checked the fuses?

Apr 3, 2025 | 03:43 AM

Dhalas818

Thread Starter

Amateur

Joined: May 2020

Posts: 44

Likes: 0

O2 sensor fuse

I did not see a fuse for the upstream sensor in my fusebox on 2008 STX 3.7L, am I missing something?

Apr 3, 2025 | 10:00 AM

HeyYou

Administrator

Joined: Apr 2010

Posts: 87,268

Likes: 4,197

From: Clayton MI

Quote:

Originally Posted by Dhalas818

I did not see a fuse for the upstream sensor in my fusebox on 2008 STX 3.7L, am I missing something?

What code are you getting?

Apr 3, 2025 | 01:43 PM

Dhalas818

Thread Starter

Amateur

Joined: May 2020

Posts: 44

Likes: 0

Getting a P0155. I swapped the upstream O2 sensors and getting same code so I know the sensors a good so it has to be something else causing it.

Apr 3, 2025 | 01:52 PM

HeyYou

Administrator

Joined: Apr 2010

Posts: 87,268

Likes: 4,197

From: Clayton MI

Did you clear codes before re-testing? That's a heater circuit code. I don't recall if all the sensor heaters are fed from the same circuit though....

Apr 3, 2025 | 01:57 PM

Dhalas818

Thread Starter

Amateur

Joined: May 2020

Posts: 44

Likes: 0

Yes. Going to take it for a ride and see what pops up next. Shouldn't take long.

O2 sensor code P0155

O2 sensor code P0155

Trending Topics