Question about 2002 Buick Rendezvous
Mpg has been bad. but no other symptoms
It's not the MAF sensor. Could be the regulator. Pull the vacuum line off the regulator and smell/ look for gas. Could be vacuum lines also. Other things can cause this code, but vacuum lines are the most likely cause. Also one the 3.4 engines, the intake upper plenum cracks at the bolt holes near the lat and right sides. Check them closely. Causing a vacuum leak.
Posted on Apr 09, 2015
Testimonial: "Appreciate the help Randy. I shall investigate the plenum and pressure regulator."
Its niether MAF or the fuel pressure regulator although its a good idea to spray some MAF cleaner on that from time to time its a vary expensive part
PO127 IS the IAT sensor Intake Air Temp .
Its located in the air duct right after the MAF sensor its 10 to 15 dollars and usely vary easy to replace no tools unplug the connecter and usel;y it pulls out of a rubber groumit
Posted on Apr 08, 2015
Testimonial: "Thanx 4the reply John, but what makes u think its the IAC? Doesn't that have its own trouble code if it fails?"
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Posted on Jan 02, 2017
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