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How do you clear codes for emission test?

Honda obd2 codes need explaination?

  • P1381 9 Cylinder Position Sensor Intermittent Interruption P0135 41 Front HO2S Heater Circuit Fault (Sensor 1) P0138 63 Secondary HO2S Circuit High Voltage (Sensor 2) P0420 67 Catalyst System Efficiency Below Threshold P1456 90 EVAP Emission Control System Leak Detected (Fuel Tank System) Alright so these are all the codes i am getting from the OBD2 test.. lol i kinda figure that most of the faults that have to do with the emissions is probably due to the first HO2 sensor being faulty but i cant really explain what the first and the last ones are. if someone could explain in a bit more detail what could be going on with my car that would be awesome. thank you.

  • Answer:

    These codes may have nothing do with the O2 sensor at all, or it may be malfunctioning. A misfire will cause a lot of the same kind of errors.

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