Code 23

[92pathyV64Dr]

Have unplugged auto choke as motor keeps over revving. Settles once warmed up but then starts again if stop at lights. Can anyone tell me if there is a sensor there I should be replacing, thanks. 1992 V6 WD21

[smj999smj]

Code 23 refers to the idle switch, which seems to make sense with your symptoms. Trouble codes aren't intended to tell one whether or not to replace a specific sensor, but to give a direction for diagnosis. To diagnose a 23 idle switch code, one needs to refer to the Nissan factory service manual for the particular vehicle and follow the diagnostic steps provided for a code 23. It "could" be due to a faulty idle switch, but could also be due to a shorted or open wire, poor harness connection, bad ground, etc.

[92pathyV64Dr]

Thanks smj999smj, will look further into it.