The air/fuel sensor, located in the exhaust system, may be damaged by moisture in the exhaust resulting in illumination of the Check Engine Light. Replacing the damaged air/fuel sensor and updating the powertrain control module (PCM) software should correct this concern.
Check Engine Light Due to Air Fuel Sensor Fault on Honda Civic Hybrid
Average mileage: 25,000 (25,000–25,000)
1 model year affected: 2006
2 people reported this problem
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2006 Honda Civic Hybrid 25,000 mi, Visitor
serviced by Honda under warranteed coverage. The problem has not occurred again even now 6 years and 55,000 miles later.