ninakeller1
Allion manifold pressure sensor issue
Summary of the thread
A 2014 Toyota Allion is experiencing reduced power, slow throttle response, increased fuel consumption, and a check engine light, suspected to be due to a faulty manifold pressure sensor. A similar issue was resolved by identifying a vacuum leak that affected the sensor's performance. The recommended solution is to consult a professional technician for diagnosis and repair, which successfully resolved the problem in this case.
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4 comment(s)
ninakeller1 (community.author)
Hmm, not really. Regular maintenance as usual. No weird noises I can think of. You said similar issue - you mean you had all the same symptoms? What did it end up being?
mario_lorenz1
Yes, the symptoms align precisely with my experience. After a thorough diagnostic examination, it was determined that a substantial vacuum leakage was the root cause, leading to a malfunctioning manifold pressure sensor. It is advisable to seek counsel from a proficient automotive technician for a conclusive diagnosis and rectification. Attempting to resolve such intricate matters without the requisite expertise may inadvertently exacerbate the situation.
ninakeller1 (community.author)
Okay, thanks for the heads up! I'll take it to the shop then. Turns out you were spot on. The manifold pressure sensor was faulty due to a vacuum leak. Cost me about 235€ to get it sorted, sensor replacement and all. Runs like new now!
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TOYOTA
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ALLION
mario_lorenz1
I have encountered a similar issue on my Allion. Were there any notable incidents preceding these symptoms? Recent maintenance, extreme weather, or unusual noises from the engine bay? These factors can greatly assist in pinpointing the problem.