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P0068 P0306 P0449 Why are all on at same time 2007 GMC Yukon

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Code p 0306 is --misfire on no 6 cylinder ===causes injector wiring ---ht leads , coil
code p 0449 is EVAP purge valve --circuit malfunction ===causes --wiring--EVAP canister purge valve --ECM and code p 0068 is MAP ( manifold pressure )sensor ( mass air flow sensor (MAF)---throttle position correlation===causes --wiring--MAP/MAF sensor--mechanical fault
could be a common wiring harness plug connection or loose connections on the ECM

Posted on Aug 11, 2017


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Posted on Jan 02, 2017

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SOURCE: 2007 GMC YUKON denali, rear brakes have an air

Here's a link to a thorough article on the subject which should help you...

Posted on Oct 13, 2009

  • 7353 Answers

SOURCE: Replace headlamps 2007 GMC Yukon

It should be pretty easy, thats why there no "directions" Lift up the hood, now at the headlights there should be 2 rods, lift these rods and the lights should lift out, to access the bulbs.

Posted on Nov 06, 2009

  • 22306 Answers

SOURCE: My 2007 GMC Yukon has locked itself 3X once with

locks have so many key positions but on a popular vehicle this can happen where they have the same key indentations ,but yopu friend couldnt start your car as it has a chipped key ,but years ago in the car rental we had two fiat puntos parked in the same car park in torrevieja and they got taken by the wrong persons so we had to drive around and find the houses and get the cars back and swop them over .but this was before chipped keys ,also had it with two ford fiestas in benidorm as well

Posted on Jul 09, 2010

  • 220 Answers

SOURCE: I have gotten a P0306 Cylinder 6 Misfire Code on a

I investigated this for over an hour while tossing things around in my head and truly think that you need to have your O2 censor checked along with your converter. One probable cause to your misfire could very well stem from your catalytic converter due to an O2 faulty etc.etc. Why not try a smog shop before tearing that engine apart any further and replacing any unnecessary gaskets. Thats a tight engine in my opinion and unless you really mistreat it, I would bet on it at race day. Have you recently been in a fender bender? Let us know cause that might change my advice.

Posted on Nov 16, 2010

  • 1 Answer

SOURCE: 2007 GMC YUKON. Keyless Entry problem. The remote ...

Disconnect the battery to the car for five mins. Thay should reset the keyless module. I had the same problem

Posted on Feb 16, 2011

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Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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