Question about Chevrolet Impala

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Keep getting Code P0481. Both fans work, all three relays have been replaced....Both fuses for fans have been replaced. Have activated the fans manualy and both work. Why do I keep getting this code? A/C works and blows ice cold.

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  • yadayada
    yadayada Sep 03, 2010

    model and year and engine size

  • irishrouge17 Sep 03, 2010

    Sorry, its 2008 Chevy Impala 3.9 liter

  • yadayada
    yadayada Sep 03, 2010

    P0481 is: problem in relay control circuit, this means that u have something wrong with the circuit not the fans, this is a wiring problem, suggest u have a GM dealer look at this, they have a scanner that can ID the exact location of the problem, it is not a relay or cooling fan issue

  • rickyrogers6
    rickyrogers6 Feb 15, 2013

    what type of scanner might this be?

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  • Chevrolet Master
  • 22,219 Answers

P0481....Cooling Fan 2 Control Circuit
something wrong with control box??

Posted on Sep 03, 2010

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Service engine Soon light on. Code P0481 on Scanner. Both fans will come on without A/C compressor on so fans are working.


It sounds like you have a control problem , The ECM or PCM energize the relay by supplying a ground or power depending on the manufacturer ! What make , year model vehicle ! P0481 Cooling Fan 2 Control Circuit Malfunction

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Iwwhat is 481 code on a mazda


Hi there:
DTC P0481 - Cooling Fan 2 Ctrl CKT Malfunction
The P0481 requires reprogramming the PCM at a Mazda dealership, see below TSB in THIS LINK:



DESCRIPTION
Some vehicles may exhibit DTC P0481 (Cooling fan relays malfunction) stored in the PCM.

The false DTC detection occurs when the A/C refrigerant pressure switch is ON but the cooling fan relay is turned OFF by the PCM because the coolant temperature is 108C degrees and under. The PCM stores DTC P0481 because the cooling fan is operating without PCM control command. This is due to improper PCM calibration.



Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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I got a P0481 code where is the fan 2 control unit and the fan control 2 relay?


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PO481 code Chevy IMPALA 2003


Looked it up in Chilton's, confirmed in http://www.obd-codes.com/trouble_codes/

P0481 Cooling Fan 2 Control Circuit Malfunction

Each fan will throw a different code. See 3 fans listed for your model. Here's a link for the wiring schematic: http://www.chiltonlibrary.com/content/images/WD/GM/014/WD_GM_014788.pdf


Best of luck.
Greg

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