And then we could tell you exactly what’s happening, and more importantly, we can accurately estimate the cost of the repair. And from there, we can do pinpoint testing on the individual components within that system to get to the root cause.įor example, if you do have an EVAP emissions code, we would test for leaks in the fuel cap area, the fuel filler hose, the evap canister, your fuel tank, fuel lines, evap hoses, and the purge or vent valve. We’ll be able to retrieve the code or codes, which will tell us which system is having a problem. If that all checks out, you’ll want to schedule an appointment with your auto repair shop for further testing. Check the gas cap to make sure it’s tight and there’s no rust or anything else preventing it from sealing. If it is the engine light, you won’t know whether it’s because of an EVAP failure or something else (unless you try to go through the emissions test lane or stop by an auto parts store that will retrieve the diagnostic trouble code or codes).īut what you can do first is see if the gas cap is to blame. (Here’s our guide on how to respond when a dashboard warning light turns on.) If you’re not sure, consult your owner’s manual. What to Do if Your ‘Check Engine’ Light Comes On:įirst, confirm it’s the ‘Service Engine’ or ‘Check Engine’ light.
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