paulaschulze1
Crown Exhaust Treatment Malfunction
Summary of the thread
A 2023 Toyota Crown hybrid exhibited an intermittent check engine light, rough running, exhaust leak, and strong odor. These symptoms suggested a potential issue with the lambda sensor, which affects the air/fuel mixture. A workshop diagnosis confirmed the lambda sensor was defective, and after replacement, the car's performance improved.
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4 comment(s)
paulaschulze1 (community.author)
I haven't checked the diagnostic codes yet. Could a defective lambda sensor cause all those symptoms? Is there a way to know if the sensor is the problem, or are more diagnostics needed?
isabellajones1
Defective lambda causing multiple symptoms? Absolutely, it impacts the air/fuel mixture. Can you diagnose it at home? That depends. With the exhaust leak, smell, and rough running, it's beyond a simple sensor swap. Take it to a workshop for diagnostics to pinpoint the cause. But yes, lambda failure is possible.
paulaschulze1 (community.author)
A workshop visit confirmed a defective lambda sensor. The repair was 375€. The car is now running well. Thanks for the help.
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TOYOTA
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CROWN
isabellajones1
Toyota Crown, interesting. Sounds familiar. Have you checked the lambda sensors, NOx sensors, or the catalytic converter? What codes are showing up? Any changes in fuel consumption?