Seeking Advice on 2008 Lexus GS Hybrid: Constant Check Engine Light and Possible Exhaust Back Pressure Sensor Issue

Hey there! I had a somewhat similar issue with my 2010 Lexus IS F Sport a while back. I'm definitely not a car expert, but always willing to roll up my sleeves and learn as I go. In my case, it turned out the DPF was seriously overloaded. I took my car to the local mechanic, who ran some tests and confirmed my suspicion. The repair wasn't cheap though, cost me a whopping 1325€! Can you share a bit more about your Lexus - like its mileage and service history? You might want to check with a professional mechanic. It's a bit of a pain, but getting a professional diagnostic might save you from lots of potential headache down the line. Good luck with it!

Hey, appreciate the response! My Lexus is just shy of hitting the 33000 KM mark, last service was done not that long ago honestly. Just like you, I do prefer seeking professional help, so I might just follow your suggestion and bring it in to diagnose. It's a bit of a hassle, but better safe than sorry, right? Anyway, thanks for your advice. I'll let you know how it goes!

Hey again! Absolutely better safe than sorry. Your mileage is pretty low, so it's kind of surprising that you're experiencing these issues, but cars can be unpredictable sometimes. The back pressure sensor could be the culprit as you suspected, but it could also be a DPF issue given the symptoms you described. I mean, in my case with my IS F, the DPF overload was the reason, and mind you, my car had clocked a lot more miles. What worked for me may not exactly apply to your GS Hybrid, however, these symptoms are quite similar. That said, I'd definitely recommend taking your Lexus to the mechanic to be on the safe side. Keep us updated on what they find. Fingers crossed it's an easy (and hopefully not too costly) fix. Cheers!

Cheers again! I appreciate you sharing your own experience with me. Indeed, as you said, the problems I'm facing could be caused by either the DPF or the back pressure sensor or maybe even something else. Honestly, I didn't expect such issues this early considering the mileage but hey, that's cars for ya! With the light being constantly on and the loss of engine power, I'm definitely leaning towards a visit to the mechanic right away. Safety always comes first! Will keep you posted on what they find. Thanks for keeping your fingers crossed for me I need all the luck I can get!