Question about 1998 Oldsmobile Silhouette

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What part throws a code like PO172 - 1998 Oldsmobile Silhouette

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P0172....System too Rich (Bank 1) - so it's either an air-flow meter or the sensors on the throttle. But you should also check the temperature sensor.

Posted on Sep 01, 2010

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O2 sensor, or vacuum leak.

Posted on Sep 01, 2010

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1 Answer

Trouble code PO172


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For me, it turned out to be vacuum leak. I searched and searched to no avail, then I found the air leak... It was the seal for the idle air control valve. Turns out, it was cracked in a spot. So, I removed the valve and the seal, used a thin layer of gasket maker, reinstalled, and now it runs perfect. No more codes either!

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2 Answers

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po172 sysmtem to rich which means its getting to much gas and not enough air po102 mass air flow sensor circuit low input p1127 and we dont know but this is what is in my book for my elantra book is for 1996-2006

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