Lexus RX Lean Fuel Mixture

Hey! Sounds frustrating. I had a similar issue with my old Volvo, though it was a gasoline engine. Check engine light, rough running, all that jazz. Did you look at the throttle body or maybe even the catalytic converter? What were the fault codes?

The fault codes indicated a lean fuel mixture, specifically the fuel injectors. Before replacing them, are there other contributing factors to consider? Was the issue with your Volvo definitively the fuel injectors?

Yeah, after chasing a few other possibilities, it turned out to be a faulty injector in the end. Honestly, with those codes and symptoms, you're probably on the right track. I'd suggest getting it properly diagnosed at a reputable workshop to be 100% sure, though.

I appreciate your insight; I consulted a trusted mechanic. The defective injector was indeed the culprit, and the repair cost 515€.