Lexus LFA AC Issues Possibly Linked to Faulty Ambient Temperature Sensor: Seeking Advice and Experiences

Hey there! I totally feel your pain. I had a similar situation with my 2007 Lexus IS F, getting about 150,000 km on it. My AC was acting up just like yours and it seemed to be the ambient temperature sensor giving false readings. The symptoms you're describing sounded all too familiar. The warm air blowing, the cooling and heating just not working right. It was downright annoying, not to mention uncomfortable, especially during the hot summer months. Went to my local mechanic, who I trust a lot. After some diagnosis, turned out it was indeed a defective cable connection from the sensor. In my case, the plug that connects the sensor was corroded and needed a replacement. The mechanic cleaned everything up, replaced the plug, reconnected the sensor and voila, everything was back to normal. In terms of seriousness, it was not a major issue but more of an annoying one. After the work was done, the heating/cooling worked just as it should - no more warm air and a whole lot more comfort. Looks like you may be in a similar boat. If it's indeed a sensor or cable issue like mine, rest assured the fix should be straightforward for a reliable mechanic. All the best!

Hey, thanks heaps for sharing! Sounds too familiar to ignore, looks like I might be playing the same gig with my LFA huh. Do you remember roughly how much it set you back to fix up your IS F? Also, since it was sorted has anything similar popped up or has it been smooth sailing? Cheers!

Hey, no worries! Always happy to help out a fellow Lexus owner. The fix for my IS F wasn't too bad on the wallet, set me back approximately 95 Euro. Not too shabby considering the relief of getting everything sorted. Since the repair, I've had absolutely no further issues with the AC or heating. Seems like that pesky sensor signal was really causing the whole mess. Once the mechanic got that cable and plug connection replaced, everything's been running as cool as a cucumber. Seriously, it's like the good old days with my sweet ride. So, based on my experience, I reckon after this fix, your LFA should be just as smooth. Good luck!

Cheers! That's really put my worries at ease. I'm taking the LFA in first thing tomorrow. 95 Euro for the comfort of a properly functioning AC sounds like a sweet deal to me. I'll definitely mention the cable and plug connection to the mechanic. I'll be looking forward to my own sweet ride. Thanks again for sharing your experience, really appreciate it. Best of luck with your IS F!