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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29534
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a check engine light, code #440,evap emission control

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I have a check engine light, code #440,evap emission control system malfunction. Can you tell me what the problem is.
Welcome. This code is a EVAP system performance code and is almost always set because of a loose gas cap or failed gas cap.
Customer: replied 8 years ago.
i tightened the gas cap, the engine light is still on, does it take a while to go off?
The test will have to pass the next test to turn the light off or use the code reader to turn the light off.
The test will have to pass the next test to turn the light off or use the code reader to turn the light off.
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