Honda SH300 2006 Manual page 56

TECHNICAL FEATURES
HEATER-LESS O SENSOR
TECHNICAL FEATURES
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SUMMARY
This model utilizes a heater-less O sensor.
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As O sensor does not function properly until it is warmed up, conventional O sensor is equipped with a heater.
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Heater-less O sensor is located near the exhaust port in order to make use of the heat from the exhaust gas, eliminating
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the need for a heater.
When the engine is warmed up to normal operating temperature, heater-less O sensor starts its normal operation.
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HEATER-LESS O SENSOR
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