Lexus RC Engine Running Lean

Having trouble with my 2023 Lexus RC gasoline engine. Feels like it's running way too lean. Reduced engine power, check engine light, rough running, and jerking when accelerating. It's got about 140581 km on the clock. Thinking it might be a fuel delivery issue, like maybe the injector is defective? Anyone else experience anything similar?

4 comment(s)

Sounds familiar! Had similar symptoms on my old Saab 9-3. Reduced power and rough running, exactly as you describe. Could be fuel injectors, but have you checked the simple stuff first, like the mass air flow sensor or even the throttle body? Has anyone checked the error codes?

Thanks for the quick reply! Yeah, I had the codes read, and it's pointing to a lean condition. I haven't specifically checked the MAF or throttle body myself yet. Did you find that your Saab also had a lean code, and if so, what ended up being the culprit for you?

Yup, lean code was the key symptom. I messed around trying to clean the MAF and throttle body, but honestly, it didn't really fix it. Ended up being faulty fuel injectors. Best bet is probably to get it to a good workshop; they have the proper tools to diagnose it correctly.

Appreciate the advice! Fuel injectors seem to be the consensus. I took it to the workshop, and you were spot on – faulty injectors! Repair cost me about 515€. Runs like new now!

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