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Home >> Hyundai >> 2016 >> Sonata Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.4L (Except HEV) (1 Of 2) >> DTC P0133: O2 Sensor Circuit Slow Response (Bank 1/Sensor 1) >> DTC Information >> DTC Description
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DTC Description

The PCM/ECM monitors the HO2S (B1/S1) transition frequency for predetermined time. During the monitoring period, the PCM/ECM calculates transition times that the front HO2S switches from rich to lean and from lean to rich. With this information, an average frequency for all switches can be determined. The PCM/ECM sets DTC P0133 when the average frequency is too slow.

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