My car just had a tune up i took it to auto zone for a diagnosis and was told something about gas cap my check engine light is still on
When the check engine light is on, it means that the ECU has detected a malfunction that will affect emissions. In your case, if the Auto Zone guys suggested that the gas cap was loose, then you may have had a P0440 code. Which might indicate an air leak in the fuel vapor recovery system. The gas cap is the simplest thing that can go wrong, but if that was not a successful fix, then you may have a leak in a vent line somewhere. The most convenient way to deal with this problem is to contact Your Mechanic. They can send a technician to your home or office to check out your Nissan and make a recommendation as to how to fix it. The statements expressed above are only for informational purposes and should be independently verified. Please see our
How do I turn my service engine light off?
1. Turn the ignition switch to the on position but do not start the car.
2. Count seven seconds, depress the gas pedal and hold it down for 10 seconds or until the service engine soon light begins flashing.
How to Turn Off Your Maxima’s Service Engine Soon Light
The only way that you are going to be able to turn off the service engine soon light is to return your Nissan Maxima to normal working order. There are no shortcuts. But, it may be worth taking a look at the gas cap. If it wasn’t screwed in tight, or seems to have a bad seal, tightening it and driving for a while may turn off the check engine light.
What does the service engine soon light mean in a Nissan Maxima?
If the check engine light in your Nissan Maxima starts flashing, that means that the problem needs sudden attention and your Nissan should be transported in promptly. This blinking light usually indicates a severe engine misfire allowing unburned fuel to be dumped into the exhaust system.
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