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Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 23591
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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What does this mean? P0641 generic sensor reference voltage

Customer Question

What does this mean? P0641 generic sensor reference voltage a circuit/open
Submitted: 12 months ago.
Category: Chevy
Expert:  Dan replied 12 months ago.

Hello, my name is***** most likely means fuel tank pressure sensor has failed or wiring has shorted. Inspect wiring good and if all looks ok replace the fuel tank pressure sensor. You can monitor voltage at sensor with it unplugged, if it maintains 5v that would mean wiring is good. Here is diagram to show rub points, let me know if you have more questions. Thanks.

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https://www.dropbox.com/s/wd7v3snm8yxqyzf/ftpsrr.pdf?dl=0

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https://www.dropbox.com/s/01maq7qzoni9cud/rub.pdf?dl=0

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