My air conditioner on my 98 LS hasn't been working. Too busy to do anything to it before. But now, I got some free times and the temp gets too hot, so I really need the AC. Did the AC diagnostic check and it came on with code 12, 21, 23, 24. Fixed the 12 since it's a cut in the wire of the Ambient sensor. And did the diagnostic in sunlight, so got the code 21 and 24 cleared also. Now, it's giving me code 23 only. I've searched around and couldn't find anything relate to that. Is it as same as code 22? I'd hate to replace the servo and dryer, etc. But if that what it is, then I got to do what is neccessary.

 

Anyone? Any idea?

 

did you ever figured out what the code 23 is? I'm having the same code on my lexus isf

 

Going by the list I have here, code 23 is coolant pressure.

 

These are from a JDM Manual written in Japanese and I simply translated them. Sorry for my limited English.

Code 12: Ambient temp. sensor
Code 21: Sunlight sensor (Passenger's side)
Code 22: Compressor locked or slipping
Code 23: Pressure switch
Code 24: Sunlight sensor (Driver's side)

Judging from the code 22 and 23 obtained together, probably your compressor is not working properly and the gas pressure is not normal. The other day, there came a car which showed Code 21, 22 and 24 but not 23 to my neighbor's shop. The shop owner asked me to help and I found that it was caused by a corroded lock sensor's connector terminal. The compressor was OK but the lock sensor attached to it was not properly sending the signal to the controller.

The code 21 and 24 are usually obtained where at the shade. They are off only under the sun.