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If there is a problem with emissions in the 2019 Honda Odyssey, the engine light will come on to alert the driver. The purpose of the engine light is to signal that a fault related to emissions has been detected, and that there are diagnostic trouble codes stored in the powertrain or engine control module. To understand the issue, you will need to have these codes scanned. Since pollution systems are closely connected to engine and transmission control systems, you may experience various drivability problems such as difficulty with shifting, hesitation during acceleration, pulling to one side, starting issues, loss of power, or other conductivity-related issues.
The emission system issue in the 2019 Honda Odyssey triggers just before a complete breakdown of the transmission occurs.