10-01-12, 06:33 PM
Hello I have a 2005 STS with 36,000 on it with the 4.6 northstar .The other day the check engine light came on .So I took it to Autozone and the codes are P0068,P0171,P0174,P1101.The man at Autozone said sounds like a maf sensor . Was just wondering if anyone has had the same problem? The Cadillac dealer service mang said that in 2009 thay got ahold of customers to bring there cars in to have yhe computer flashed and reprogramed to read more air flow .If anyone knows if this is true it would be greatly helpful .
10-01-12, 07:08 PM
I had the same problem. I took out the MAF sensor, washed it with ethyl alcohol, rinsed it with hot water, and dried it with a hair dryer and haven't had a problem since.
^^^ Good idea.
Even though that's low mileage, if you've never had the throttle-body cleaned consider it.
As mentioned earlier, I would try cleaning the sensor first. They make a MAF cleaner or you could use contact cleaner or brake cleaner.
10-02-12, 02:27 PM
Thank you will try that .The Cadillac dealer is now telling me that it might be the manifold gasket leaking .He said thay had alot of trouble with this year . Iwill try cleaning the maf and throttle body thanks once again.
10-02-12, 02:41 PM
Check the cap screws that hold down the intake manifold. Most loosen over time.