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2016 Camaro RS P0480 Code: Cooling Fan Not Engaging Despite AC On

Model: 2016 Camaro RS Fault Code: P0480 Posted: 2021-01-02 09:45

Hello everyone, I'm currently troubleshooting a persistent issue with my 2016 Camaro RS that has been causing me frustration. Previously, I experienced cooling problems—first due to a blown fuse, then a small coolant tank leak—but now the problem is more complex and ongoing. The issue began when my check engine light triggered a P048 or P0480 code (Cooling Fan Control Circuit Malfunction). When I opened the hood and turned on the AC, the main cooling fan did not activate even as the temperature gauge rose. The temperature reading on the dashboard is accurate—increasing during slow driving or stops—and the fan motor itself has been tested and confirmed to work when powered directly. A local mechanic diagnosed the problem as a faulty cooling fan motor control module (FCM). I ordered the OEM part, but delivery was delayed. In an attempt to save time, I installed a used FCM from a scrapyard Camaro RS—no success. I then tried another unit from a different source, and it also failed to activate the fan when AC is on, even after resetting the OBD2 code. I'm now seeking advice: Is there any specific testing procedure or troubleshooting steps that can help identify whether the issue lies with the module itself, wiring, power supply, or sensor inputs? I understand that GM produced three different types of variable-speed fan systems for the 2016 Camaro RS. Could my vehicle be one of the third-generation models where a separate fan control module is required? Additionally, does anyone have experience with using scan tools to send test signals directly to the fan control module? Or recommend specific diagnostic equipment (like a lab scope) or wiring diagrams for this system? I'd also like to know if power and ground checks are necessary—especially since the module needs both signal from the PCM and proper voltage. Any insights, tips, or known fixes would be greatly appreciated!

Related fault codes
P0480
Comments (4)
Anonymous 2021-01-04 19:00

My 2016 Camaro RS has two cooling fans, and when the AC is turned on, both fans should remain active. If only one fan is operating or neither turns on, this could indicate a control module issue or wiring fault.

Anonymous 2021-01-05 03:38

I have only one front-mounted fan in my setup, which may be standard for my model year. It's possible that the original equipment had a single fan, and it was replaced by a previous owner—this could affect how the cooling system operates.

Anonymous 2021-01-05 09:10

According to service documentation, the 2016 Camaro RS is equipped with one variable-speed cooling fan. GM produced three different versions of this system. If you've tried a used fan control module from a junkyard and it failed, your vehicle may be the third-generation model that uses a separate fan control module. The Powertrain Control Module (PCM) receives input signals from the AC pressure switches and coolant temperature sensor. It then sends a pulse-width modulated (PWM) signal to the fan control module, which adjusts the fan speed accordingly. The fan should activate at low speed when coolant reaches 214°F and switch to high speed at 228°F. The fan is controlled via a PWM signal from the PCM to the cooling fan control module. To properly diagnose this issue, a scan tool with bidirectional control capability can be used to manually trigger the fan and test whether the output or wiring is functioning correctly. A lab scope can also verify if the PCM is sending the expected on/off signal. If your OBD2 scanner shows accurate coolant temperature readings (increasing as expected), but the fan never activates, this points toward a failure in either the module, power supply, ground connection, or wiring between the module and fan. A digital multimeter can help verify that the fan control module is receiving proper power and ground. I can share specific wire colors and connections if needed—please let me know. Joe

Anonymous 2021-01-05 11:33

Always check fuse F4 (60-amp) in the underhood fuse block—it's responsible for powering the cooling fan. A blown or loose fuse can cause the fan to fail even if the control module is working.