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hanneswinkler8

Toyota Crown Whistling Noise Power Loss

Hey, I'm having trouble with my 2017 Toyota Crown with a gasoline engine. Check engine light is on, and the engine feels like it's lost power. There's also a loud whistling noise when I accelerate. Error memory says something about a charge air temperature sensor. Mileage is at 188210 km. I've checked the air intake. Any ideas? Could this be a faulty temperature gauge?

Summary of the thread

The 2017 Toyota Crown experienced power loss and a loud whistling noise, with the check engine light indicating a charge air temperature sensor issue. The problem was traced to a split hose in the intake and a defective sensor plug. Replacing the plug and fixing the hose resolved the issues, restoring the car's performance.

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4 comment(s)

johannadrache1

Sounds frustrating. I had a similar issue with my old 2014 Volvo S60. Same loss of power and weird hissing sound. It also turned out to be sensor-related, though mine was the mass airflow sensor. My mechanic said a faulty sensor will sometimes cause the car's computer to pull back the timing and fuel delivery to protect the engine, which is why you're feeling the power loss. Did you check the sensor's wiring and plug? It could just be a loose connection.

hanneswinkler8 (community.author)

Thanks! I suspected a sensor issue. Any tips on what I should be looking for specifically when checking the sensor's wiring and plug? I'm not exactly a mechanic, but I'm willing to get my hands dirty if it's something simple. Could temperature fluctuation be a sign of this?

johannadrache1

Well, in my case, the wire to the MAF sensor had corroded where it plugs into the sensor, which caused a bad connection and tripped the error. You'll want to check that the connector clicks firmly into place and that all the wires going into the connector are secure. Also, look closely for any signs of damage to the wiring, like cuts, frays, or corrosion. If you're not confident working on it, I'd advise taking it to a workshop to be on the safe side. The computer can do more damage if the wrong values are used.

hanneswinkler8 (community.author)

It turned out the whistling was a split in a hose connected to the intake, but the charge air temperature sensor error was indeed a defective plug. Replaced the plug, fixed the hose, and she's running like new again! Cost me about 95€.

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TOYOTA

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CROWN