Discussion Starter · #1 ·
Hi guys, I have been having an A/C problem with my s500 lately, and I have already checked the encyclopedia and did not find the answer. The A/C blows warm air on warm days and the ac off light came on and would not go off. I pulled the codes through the A/C computer itself and got Error 1269(communication error in CAN bus with B31/1). I have had this code for several months, but the A/C just started blowing warm air. I also noticed that NR16, NR17, and NR18 all read "error". I have replaced the multifunction sensor under the hood with a used one and cleared the codes but it made no difference. Before I replaced the sensor I also noticed after I cleared the codes I could press the A/C off button and the light would go off and I would have cool, not cold, air for about 30 seconds. I am wondering if this could be a duovalve, another sensor, or the A/C compressor itself, as my car has ~140k miles. Any help is appreciated, thanks in advance!