Question about 2003 Chevrolet Impala

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I am getting a p0481 trouble code. what is the fix for this

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  • rydalemalone Feb 01, 2010

    the p0481 code causes my care to fail emmisions test. but when my heater is on my car never over heats and the heater works.

  • john h May 11, 2010

    --cooling fan 2 control circuit malfunction--check the cooling, fan, wiring ,fuses and connections for damage or disconnection also check the cooling sensor



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  • 12,139 Answers

Clarification request is solution sorry fat fingers

Posted on Feb 01, 2010

  • john h Feb 06, 2010

    ur failing due to check engine light [code ] most states any code can fail ur vehicle-its the fan infront of radiator usually comes on when fan one cant handle heat load or when a/c comes on -if the car failed on emissions other than code ===to high co's - cat-converter not up to temp-or other things the print out of failure will tell u what ur emissions failure is so u can fix problem-also if u reset any codes or disconnect battery before an inspection need to let vehicle cycle thru before u can pass usually about 125-150 miles



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The P0481 requires reprogramming the PCM at a Mazda dealership, see below TSB in THIS LINK:

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.

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1 Answer

PO481 code Chevy IMPALA 2003

Looked it up in Chilton's, confirmed in

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Each fan will throw a different code. See 3 fans listed for your model. Here's a link for the wiring schematic:

Best of luck.

May 23, 2009 | 2003 Chevrolet Impala

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