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Can a p0451 code on a 2008 Chevrolet Equinox 3.4L be caused by the gas cap?

Vehicle: 2008 Chevrolet Equinox 3.4L

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P0451 Fuel tank pressure (FTP) sensor performance

Yes it can and it, especially if P0442 is accompanied with P0451.
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P0451 Chevrolet Code - Fuel Tank Pressure Sensor Performance
Read more: https://www.autocodes.com/p0451_chevrolet.html

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