Sienna bypass valve malfunction

I've got a 2023 Toyota Sienna hybrid with about 43k km on it. I'm getting an error about a bypass valve malfunction and the engine is overheating. I suspect it's a consequential error, but I'm not sure what's causing it. Any ideas where to start looking? I checked the error memory with a OBD2 scanner.

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Hey, I have a Toyota Sienna too, not sure about the year, but I had similar overheating issues and an error code related to the bypass valve. Did you check your vacuum system and air intake for any leaks? It could also be a coolant leak messing things up.

Thanks for the tip! I'll check the vacuum system and air intake for leaks. But if it were a coolant leak, wouldn't I see some visible signs or a drop in the coolant level? Anything else I should look into before tearing everything apart?

Yeah, you'd think so about the coolant. But in my case, it was a very slow leak, hard to spot. Check around the exhaust system too, just in case something's dripping there. Honestly, with those symptoms, might be worth getting it checked by a workshop if you're not 100% sure.

Appreciate the advice! Turns out it was indeed a faulty sensor causing a chain reaction. The workshop reset everything and the error is gone. No repair cost, it was just a glitch!

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