1. Turn the ignition switch to ON
The Maintenance Minder indicator ( Based on the engine operating conditions, the remaining engine oil life is calculated and displayed as a percentage.
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Honda Odyssey Owners Manual > Information: Emissions Testing
Testing of Readiness Codes Your vehicle uses “readiness codes,” as part of its onboard self diagnostic system. Some states refer to these codes during testing to see if your vehicle's emissions components are working properly. The codes may not be read if you go through the testing just after th ...