You could try buying CRC mass air flow sensor spray cleaner from Walmart. Spray it on the sensor with it unplugged. Then plug the connector back in. The auto repair shops are most likely buying an oem part and adding a markup to it. Resetting the check engine light is very simple. You can buy a handheld scanner that plugs into the obdII port under the dash. The simple scanners are very cheap, check Amazon.
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