Engine Whine: As Troubleshooting Advise

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skooter65

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First time I have experienced any engine noise; here were the circumstances:

Vehicle: 1999 Tahoe LT; 148,000 Miles

-Cold Started this morning, and By Cold, I mean sub-zero (-12 or so). Small amount of difficulty starting which I expected given the temperatures.

-While it was idling, I began to notice a slight whine/whurr coming from the engine (Upon further inspection, it seemed to be emanating from the lower front section)

-A minute or two in, the whine got progressively louder.

-At about 3-minutes, the whine was significant and the Check Engine Light Illuminated.

I killed the ignition and we took the wife's car to work. Haven't had a chance to troubleshoot so I figured I would check with the experts before tearing into anything this evening.

Your help/input is greatly appreciated.
 
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SunlitComet

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i need the code that set off that light warning.

---------- Post added at 04:44 PM ---------- Previous post was at 04:43 PM ----------

without it is just a big guessing game.
 

Donnie Yukonie

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when my tensioner went out It made a whine like you describe but never threw codes ….
 
OP
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S

skooter65

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Well, Seems like it was just a strange set of coincidences. The whine was a failing idler pulley (Almost certain). the code was an O2 sensor heater circuit.

Changed Pulley, reset code and everything seems good to go.

False alarm!
 

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