OliviaL19

Supra check engine light and power loss

I'm having issues with my 2020 Toyota Supra IV, gasoline engine, around 147k kilometers. The check engine light keeps popping on, and the car feels like it's lost power. Engine response is terrible, plus I'm hearing a weird whistling noise whenever I accelerate. Sometimes, the engine even stalls when idling, and my fuel consumption has definitely gone up. I'm thinking it might be something with the turbo, maybe the wastegate? Any ideas?

A 2020 Toyota Supra IV is experiencing a check engine light, power loss, poor engine response, a whistling noise during acceleration, stalling when idling, and increased fuel consumption. The suspected cause is a turbo-related issue, possibly the wastegate or boost pressure actuator. A similar problem in another vehicle was resolved by identifying a faulty boost pressure actuator through a smoke test. It is recommended to have the vehicle professionally inspected, focusing on the boost pressure actuator and potential leaks.

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4 comment(s)

Sounds rough. I had a similar issue with my old BMW 335i. Check engine light, loss of power, the whole shebang. Turned out to be a faulty boost pressure actuator. Do you feel any air escaping under the hood? Any signs of a boost leak perhaps?

Boost pressure actuator, huh? I haven't really checked for that specifically. Where exactly is that located, and is it something I can easily inspect myself? How did you pinpoint it to the actuator? Any specific tests you did?

On the BMW, it was near the turbo, kinda tucked away. I'm not sure where it is on the Supra exactly. Honestly, I couldn't really see much, but I could hear the air hissing around that area. I took it to a workshop, and they used a smoke test to find the leak and then diagnosed the actuator. I'd suggest getting it checked out professionally, especially with all those symptoms.

Thanks a lot for the info! I'll take it to a trusted workshop and have them check the boost pressure actuator and do a smoke test. That sounds like it could be the culprit. The final bill revealed it was the electrical bypass valve, costing me around 250€. Hopefully, that fixes everything!

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TOYOTA

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SUPRAIV