Check engine light it comes on when I turn the blower or fan on?

2007 SATURN VUE
138,000 MILES • 3.5L • 4WD • AUTOMATIC
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CORRECTIONSGIRL2
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Why does a check engine light come on when I turn the heat on, it comes on when I turn the blower or fan on?
Nov 2, 2024 at 1:03 PM
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STRAILER
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It sounds like you have an alternator that might be bad or the blower motor is pulling too many amps. We will know for sure if you run the codes to see which ones are stored. Please go over this guide to help you see which codes they are so we can fix the car.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is the blower motor location in case you have a low voltage code. Please go over this guide and get back to us.
Nov 2, 2024 at 5:22 PM
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CORRECTIONSGIRL2
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I actually have no idea what those diagrams are and what I'm supposed to do with it, lol. I did a scan, and it had code p0705.
Nov 2, 2024 at 5:37 PM
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STRAILER
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It just shows what needs to be done to check out the problem so you have an idea of what the repair will entail. This code should not have anything to do with the blower motor.

The P0705 code on a 2007 Saturn Vue indicates an issue with the Transmission Range Sensor (TRS) Circuit.

Could it be that the blower motor operation is just a coincidence? Just it has the problem each time you turn the blower motor on, can you please shoot a quick video with your phone so I can tell for sure what's going on. You can upload it here with your response.
Nov 3, 2024 at 11:18 AM
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CORRECTIONSGIRL2
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That was the second time I got that code when I turned the blower on, then when I did a scan, I got the P0705 error code.
Nov 3, 2024 at 3:54 PM
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STRAILER
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Lets clear the codes and try the blower motor again to see if the trouble code comes back.
Nov 4, 2024 at 9:33 AM
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CORRECTIONSGIRL2
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Okay, I will let you know when I do.
Nov 4, 2024 at 5:49 PM
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CORRECTIONSGIRL2
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I drove for 5 minutes with the fan on, no dash light, I turned the car off for 30 minutes. I turn drove 5 minutes, turned the fan on and got a dash light. I did a scan with the fan on and got the same transmission error so I cleared the codes and scanned I got no errors, but the dash light stayed on.
Nov 5, 2024 at 9:03 AM
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STRAILER
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I don't think the blower motor will make this code, can you try it again without turning on the blower motor to see if you get the same code?
Nov 5, 2024 at 10:33 AM
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CORRECTIONSGIRL2
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I don't get it unless I turn on the fan.
Nov 5, 2024 at 11:28 AM
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CORRECTIONSGIRL2
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I don't get it unless I turn on the fan
Nov 5, 2024 at 11:28 AM
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STRAILER
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The fan motor must be causing turbulence in the electrical system, I would replace the blower motor and then clear the codes, please let me know what happens.
Nov 6, 2024 at 9:11 AM
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CORRECTIONSGIRL2
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Okay, I will.
Nov 6, 2024 at 9:14 AM
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CORRECTIONSGIRL2
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I disconnected the battery overnight and I don't get an error code when I turn my blower on. I scanned It and got no error codes.
Nov 17, 2024 at 10:07 PM
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CORRECTIONSGIRL2
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My car has a burnt smell after driving only 10 minutes and when I open the hood its very hot.
Nov 17, 2024 at 10:08 PM
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STRAILER
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I am glad you got the problem fixed :) Sorry, we only handle one problem per thread, please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
Nov 18, 2024 at 10:34 AM