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Honda Rancher 420 - OEM Oxygen Sensor - 36531-HR3-A21

4026 Views 4 Replies 3 Participants Last post by  Landphil
The original Honda OEM oxygen sensor part number was 36531-HR3-A21 and was changed in the past year or so to part number 36531-HR3-A22. In so far as the most common DTC error code 23 for this sensor, which indicates an oxygen sensor heater problem, e.g. either a high resistance or open measurement between the two heater wires (white) on the sensor, the normal readings for the two sensor types between the two heater wires are as follows:

36531-HR3-A21 : 6 - 10 ohms (approximate)

36531-HR3-A22 : 14.5 ohms (approximate)

Several other sources for clearing Honda DTC error codes are covered by numerous other sources both on this forum and elsewhere.
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Happened to my 16 with less than 100hrs, changed it and all has been good. Easy job
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I did buy the reset tool, its still a pain to use. This site has the info/service manual for the 14 rancher. Same thing as the 16
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