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P2279 Code + RPM Issues when turning steering wheel

 
Old 11-20-2018, 11:38 AM
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P2279 Code + RPM Issues when turning steering wheel

Hey all, hoping someone can help me out with something.
Recently had the CEL come on and when I look at the code I'm seeing a P2279 code. Trying to diagnosis what it could be. I've used the propane technique to try to locate any leaks without much luck.
There is a hissing sound coming from near the throttle body, but still need to make a "poor mans stethoscope" to see if I can pinpoint where its coming from.

One thing I am curious about, is that in park when the car is idling maybe around 800 RPM, if I move the steering wheel left or right by maybe 5-10 degrees, the RPM jumps up to about 1200 to compensate for the power steering I believe.
That seems unusual to me, but I don't have another TSX to determine if it is normal. Would someone mind trying and let me know.


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Old 11-22-2018, 09:52 AM
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A smoke machine is most reliable way to locate a leak. See following video for an inexpensive device. Carefully inspect rubber intake air boot for splits.

There is a PS pressure switch which causes an increase of throttle to compensate for steering load. It should not cause that much rpm increase .


good luck



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Old 11-22-2018, 02:13 PM
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This is awesome, will build this tonight.
Where would you suggest connecting it into the car, what other prep work needs to be done before I start pushing smoke in?


Thanks for the input!
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Old 11-23-2018, 10:55 AM
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Disconnect a vacuum line to deliver smoke. Block intake air duct w/ rubber glove or plastic bag. see following video for details.


good luck
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