1A400B - Electric fan, function: Switched off.

[Mr.Luppi_A90]

Hi everyone im experiencing in those days the code mention in the thread’s name, when i start the car fan is off, affer drive a bit and let her on idle with max A/C on the fan operate without problem, i stay to check that the fan was operating for more than 10 minutes and then turn off the car and the fan turn off, my question is at this point, why this code? I attached a video.

Thanks for all the people will try to help

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[ShakaDaKine]

That code usually indicates that the DME has lost control of the fan, causing it to run by default, to prevent overheating. Do you have a rodent problem? Check the wiring harness on the fan shroud for damage. How old is your battery? Could be a loose ground or blown fuse as well.

 

[Mr.Luppi_A90]

Battery has 5yo now

That code usually indicates that the DME has lost control of the fan, causing it to run by default, to prevent overheating. Do you have a rodent problem? Check the wiring harness on the fan shroud for damage. How old is your battery? Could be a loose ground or blown fuse as well.

battery has 5yo now you think could be a bit tired and cause those faulty code? actually never had problem of rodent fortunately, in any case i will check all the wiring on the fan and and even if i find any kind of damage in the structure (almost impossible), about the fuse is the number 70, could it be? Thanks for your help

 

[ShakaDaKine]

Yes, a tired battery can cause communication errors between the modules, leading to false codes. Check all connections...not sure about the fuse, but I'd check the fuse box in the engine bay (high amp-Fan/DME).

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