This is a Honda Emission System False Positive error message. Many Honda models, particularly the CR-V, report false "emission system" warnings caused by bugs in the software that checks for EVAP leaks. These false error messages can be fixed with an engine management computer software update.
If your Honda displays this message, a scan tool can provide the specific OBD-II error codes, which can indicate whether the problem is a software glitch or a tangible hardware fault requiring repair.
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