Code p0481, cooling fans

2006 CHEVROLET UPLANDER
170,000 MILES • 2.5L • 6 CYL • 2WD • AUTOMATIC
Avatar
JOSUE RODRIGUEZ2
  • MEMBER
  • 23 POSTS
I have a p0481 code on my vehicle and have re­set it and it keeps com­ing back. I check the re­lays, wiring, and fans and they all work as they should. The motor was change about 2 months ago. I heard that there needs to be refrigerant in the compressor for the cooling fans to run but i don't know if that's true. I also don't think it's the temperature sensor because it works on the dashboard. Any help would be appreciated.
Feb 24, 2021 at 10:17 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
KASEKENNY
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 18,907 POSTS
This is not true. The compressor will not run if the system is empty but the PCM will still command the fans on if it needs it.

We need to run through the testing for this code that I attached below. More then likely you have a wiring issue or a relay issue but if you checked the relay then that would leave wiring.

Let me know if you have questions with this testing and we can work through it.

Thanks
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Attached Media
Feb 25, 2021 at 3:39 PM
Advertisement
Avatar
JOSUE RODRIGUEZ2
  • MEMBER
  • 23 POSTS
It was the PCM.
Jul 7, 2022 at 7:58 PM
Avatar
STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
Jul 9, 2022 at 12:46 PM