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marthalange1

Lexus RC Bypass Valve Malfunction

My 2017 Lexus RC hybrid, with 34972 km, is showing a bypass valve malfunction. The error is stored in the error memory, and the engine is overheating. Could this be a consequential error stemming from another problem?

Summary of the thread

A 2017 Lexus RC hybrid is experiencing a bypass valve malfunction, leading to engine overheating. This issue may be a consequential error from another problem, such as leaks in the vacuum or exhaust systems. Inspection revealed that the bypass valve error was indeed a result of another issue, and the problem was resolved without any repair costs.

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4 comment(s)

ellaschubert2

I have a Lexus RC too. Although not hybrid, I had similar symptoms. Check your vacuum system and exhaust system for leaks. A small leak can trigger all sorts of weird errors. Think of it like a domino effect in your car's systems.

marthalange1 (community.author)

Interesting. By vacuum system are you referring to the entire intake manifold and associated hoses? When you say exhaust system, do you refer to the bypass valve itself?

ellaschubert2

Affirmative to both. I had a cracked hose near the intake, causing a vacuum leak. My mechanic said that this caused the bypass valve to work overtime and trigger the error, maybe it's worth bringing into the workshop?

marthalange1 (community.author)

Understood. An inspection of the complete vacuum and exhaust system was performed. Turns out the error stored in error memory concerning the bypass valve was indeed a consequential error from another problem. Repair cost: 0€

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LEXUS

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RC