Check Engine Light Due to Primary O2 Heater Failure on Honda Civic

Problem Description and Possible Solution

A failure of the Primary O2 sensor heater can cause illumination for the Check Engine Light. Replacing the O2 is required to repair this issue.

Problem Data
RepairPal Verified
Average mileage: 250,000 (250,000–250,000)
1 model year affected: 1999
2 people reported this problem
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replace both 02 sensors the cat. throttle body sensor, map sensor, did tune up, vac. line fuel filter

bank one sensor still error out anfter 200 mile or so runs fine