The 449 and 443 are not interconnected in any way so I would say it is a coincidence that you had both set in a matter of days. I hesitate to tell you to replace the pcm, that is an expensive guess without the right tools to diagnose. And I clear it again and so on and so forth. My gas cap seems fine but not sure if this could be my issue or not. All components must be tested for proper operation thoroughly before they are replaced otherwise perfectly working parts may be replaced unnecessarily.
Claims with repair orders prior to September 21, 2012, must be submitted to the Service Contract provider. Put the tape over the light. The Plug into the Canaster goes right in and the breather goes up the filler line by the gas cap. Something may indeed be going wrong with the computer or that one connection I haven't been able to check. I would recommend having a professional from YourMechanic come to your location to take a look at your car to properly diagnose and repair. Also, how long is the emissions warranty on a 2008 Silverado? You might be best off in this case to explain where you are at and what you have done to someone with a tech-2 and get it diagnosed before throwing more money at it. Need help with a P0449 code? This test monitors the number of high resolution pulses which have been missed not detected.
What causes the P0449 code? YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Obviously I used a scan tool to monitor the voltage on the 5 volt reference 1 circuit and was able to locate this problem in a timely manner. How long is this warranty for? Shocked they just didn't take care of this under the campain throttle body and emission warranty for the vent soleniod. Fuel Evap Canister vent solenoid failure symptoms, Diagnosis and resolution in detail. What repairs can fix the P0449 code? Well that did not go over so well. Tape over the light actually was quite comforting. Thanks for any help My car has 123000 miles.
There were a lot of codes stored but the only one of real relevance was Code P0641 Symptom 00, 5 volt reference circuit 1. You should only need to jack the car up but not actually remove the tire for safety I always recommend using a jack stand in addition to the jack itself. These codes have nothing to do with weather or not the system can hold vacuum, they are purely codes that indicate an electrical circuit failure for the indicated output. My car has a manual transmission. I can't stand it anymore.
Could there be some other problem that is setting P0443 besides the purge solenoid itself??? About a month ago my car began showing an engine code, which appeared after I ran out of gas that is its own story. There are approximately 64 high resolution pulses for every cam pulse. You could check the ground circuit with the active circuit voltage drop with both sides pcm and purge disconnected to check that circuit too. About 30seconds later or so, I could feel it drawing a vacuum because of the pulsating suction on my finger. I have read other threads on here of other members having the same throttle body issues and the dealer not covering it.
Note that this code can be read with a low-cost engine diagnostic and scan tool. Being a solenoid that requires some amperage to push I wouldn't check the B+ side with a volt meter, I would use a light. Look up the other , please use the search box. These codes have nothing to do with weather or not the system can hold vacuum, they are purely codes that indicate an electrical circuit failure for the indicated output. The truck is 2 months out of warranty, time wise but is 22K mile under 100K. Most of us have had this problem and some have not bothered with it. If you have any doubt as to repairs on your vehicle, please contact your technician.
See where the fuse is located that powers the solenoid. I've made an appointment with the Chevy dealer to check things out. Pretty obvious that we a have a problem here. Could it be the computer going out??? I've already been investigating the idea of where I can get my hands on a Tech-2 scan tool. I've made an appointment with the Chevy dealer to check things out. I mean can I just get one and replace that? If you want to speak with a staff that has over 250 years of combined experience, call or now! You can really dammage electronic components if you do the tests wrong. I hesitate to tell you to replace the pcm, that is an expensive guess without the right tools to diagnose.
I shut the engine off, restated it and drove off and everything seemed ok. Here are some pics of the old and new. So 1st I replaced the canister purge valve as recommend by my local auto zone in a free obd2 scan. The dealer that it was being serviced at said there is no warranty for either issue. But, what could I say, right? I cut the wires right where they had been rubbed then installed heat shrink tubing and reconnected with a quality splice terminal. See how to understand the wiring back to the solenoid, and test it for proper operation, with simple multi-meter that supports reading voltage and resistance ohms. I am just trying to get info supporting if this should be coverend or not so that she doesn't have this expense out of her pocket up front.