Vehicle Questions and Answers
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If the "check engine" warning light pops up in the Honda Odyssey, it usually means there is an issue with an emissions leak causing a gas smell and reduced fuel efficiency. Check if the gas cap is securely closed to turn off the light. Another possible cause could be a faulty fuel tank pressure relief valve. A recent oil change might have left the oil filter, filler cap, or dipstick loose, triggering the signal. Excessive starting and stopping can strain the catalytic converter. To clear the warning, drive at highway speeds for 15-20 minutes. If these steps don't solve the problem, the warning may signal trouble with the transmission, O2 sensors, or spark plugs. Consult a technician with an OBDII scanner for a proper diagnosis.
If the check engine light in your Honda Odyssey turns on, it could indicate a loose gas cap or defective fuel lines. Make sure to stop the vehicle and tighten the gas cap securely.