Chevy GM truck P0446 diagnosis

Chevy GM truck P0446 diagnosis

Correctly diagnosing P0446 code on Chevrolet and GM cars and trucks

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mjg263 says:

Thanks for the tip on this, great information! As long as the tank is out might as well do the fuel pump and sender too I suppose. I've got a weak pump in my 2000 S-10, you've got to prime it a few times before attempting to start it when the fuel level gets too low.

Cheezy Dee says:

Didn't mention if the value is close to 5V it could also be a bias voltage, which would mean the wire is cut/disconnected somewhere.

umajunkcollector says:

Makes me want pre 90s, better yet, pre 70s – before the EPA BS, when the only device was a PCV valve.

jsciarri says:

Yeah that's a huge job to drop the tank on a late 4th gen F-Body just to get to that part, so I can totally understand the labor time involved in doing the repair.

Bottomlands says:

It almost always a sensor defect, rather than a defect in what it's sensing.

T.O.A.G says:

This is good info. My Silverado did the same thing. I replaced the gas cap.

Corinna T Roberts76 says:

Those OBE code readers for diagnosing problems are great. I have one & it’s saved me a lot of time & money with my car. 🙂

Jay Man says:

Made in China part.

Snake_ Hole says:

would you mind sharing what reader you use?

Aeduo says:

I wouldn't mind automotive stuff on this channel, personally, but like the other comments say, when it happens make an announcement.

Remi Mattera says:

I’m sorry, but a few years as a GM dashboard technician tells me your in a Pontiac Firebird or Chevy Camaro from the late 90s to the mid 2000s, not a truck.

cityside75 says:

I've been getting this code for years in my 2002 Subaru WRX and my research shows it's a common problem on these cars as well. I wonder if perhaps they use the same part in that vintage Subarus? I've tried the standard steps of changing the gas cap and reinforcing the evap line connections but the problem persisits. Thanks for the tip!

Franklyn Polster says:

Interesting.

Jeff Jones says:

Yep car Diag for the win dude !

Gregory Malchuk says:

Bad sensors cause more problems than bad hardware itself. Engineers should focus on improving the reliability of their sensors.

Zirok1982 says:

Please let us know when you create another channel, I'm interested.

bill myke says:

I've been an automotive technician for a very long time now and electronics are a hobby of mine that's why I was originally turned on to your channel. But to see a channel covering something like this would be really great. Good no nonsense style.

John Schroeder says:

I'd watch a new car channel (by you) just for the info.

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