2004 Chevrolet Malibu 2.2L Ecotec P0171.

Question = Can the Mass Air Flow sensor be tested with a multi-meter?
Why does my  malibu have this code.

Answer:
It can be done if you have a meter that can reads hertz. Best way is to look at data on a  scanner
after checking the basics- power, ground, continuity of wires. A common cause  for this condition is
a vacuum leak. There is also a PCM update available to correct a false  setting of this code.
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2005 Chevy Malibu.
Engine size = 6.0
question = I have 2005 malibu that has a sucking like vacuum noise coming from engine and it
has no power when taking off because it is sucking in so much air.
Answer:
By your description, this would be hard to determine without actually hearing - feeling the car. But
you should have the fuel pressure checked, make sure all the air intake system is intact between
the air filter and the engine, and have the catalytic converter checked for being plugged.


2004 Chevy Malibu V6 Check engine light.
Codes = p0455.
Question: I have a 04 Chevy Malibu and my check engine light is on. I have a
friend who has a scanner check it out and it read code p0455. She doesn't know
what the codes mean and we looked online to find evap leak.. Our problem is that
we dont know what that is, can u help??
Answer: A trouble code P0455 is for the Evaporative Emission System, and it
means there is a large leak detected. Basically, the EVAP system controls fuel
fumes and monitors fuel tank pressure. When the system cannot seal properly, it
will set a code. The code you have is for a major leak, and by leak I mean a leak of
vacuum from the system or fuel vapor escaping when it shouldn't. The most likely
cause is a gas cap that wasn't properly put back on, or the car being fueled while it
was running. Check to make sure the gas cap is tight and the proper type for your
car. Another possibility is what's called the EVAP Vent Solenoid. If there is a
problem with that solenoid, it will let the fuel vapor vent to the atmosphere when it
should be closed. It will most likely have to be checked out by a professional. They
can put a better scanner on the car to check for problems and can also pressurize
the EVAP system to find a leak easier.
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Chevrolet Malibu Engine Code P0171 Lean And P0455 Large EVAP Leak