Q: Will any of the auto discount stores check the fuel cap? I am getting a P0440 code & have replaced the vent & purge solenoids

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I am getting a P0440 code & am needing to know if any of the discount auto parts stores will do a free fuel cap inspection? I have replaced both the purge and the vent solenoids. All vac tubes have been replaced as well.

My car has 103000 miles.
My car has an automatic transmission.

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