Q: P0483, with engine overheating.

asked by on

Hi Joe i have 2015 GMC 2500 6.6 Duramax check light on code P0483 cooling fan rationality check malfunction didnt over heat until temp remain normal driving empty, with the check light on, when towing aircon cut out temp risers and began to overheat P0483 indecates wiring or relay or controller no lose or disconnected wires have already replace fan and clutch check light came back on

My car has 13000 miles.
My car has an automatic transmission.

Hello. P0483 is the trouble code a "Cooling Fan Rationality Check Malfunction. If the computer detects a discrepancy between the cooling fan’s commanded state of operation, versus the actual state of the circuit, it will set off this code to notify the driver of the issue. In most instances this trouble code is set off by electrical issue with the cooling fan circuit, and will result in cooling fan malfunctions and engine overheating. If the engine only began overheating during towing, it may be possible that the increased weight of the towing is what pushed the vehicle to reach excessively high temperatures. If you have already replaced the fan and clutch then a few other things I would look at are the fan wiring, fan relay, carefully inspecting them for any signs of wear or damage that may be cutting power to the fan. If you are unsure, I would recommend having a professional techician, such as one from YourMechanic, come to your location to diagnose the cause of your check engine light and cooling fan malfunctions.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. P0483, with engine overheating.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: No power to clock, radio, or side mirrors

Hi, thanks for writing in. I think you are on the right track as far as the ACC 1 relay. I would recommend consulting your owners manual to locate this information. The owners manual will almost always provide this information....

Q: I was backing into my drive way and my truck slipped of the edge hitting some thing causing the traction control to kick in and no

Hi there. There could be multiple issues causing this noise, ranging from a loose serpentine or drive belt, to damaged pulley's, exhaust or other moving components. I would recommend having a professional mechanic come to your location to complete a...

Q: Stalling and overheating problem - 1996 Acura TL

It sounds like your vehicle may have having an issue with the fuel delivery. The fuel is likely not reaching the engine in an amount sufficient enough to keep it running. Possible causes of this issue would be a faulty...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...