Problem with my 2004 Chevrolet Malibu
2.2L Ecotec
P0171
GM tech = JK
question = Can the Mass Air Flow sensor be tested with a multi-meter?
Why does my  malibu have this code.

JK:
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.
2001 chevy malibu wont start, theft security light.
2004 cavalier abs trac off and service vehicle light on
A few other Chevy questions.
Steering Problem on My 2009 Chevy
I have a clunking noise in the front end and the steering. It happens when i am turning slowly
like in a parking lot. Going forward gear or backwards does not change the sound. When i
am driving and going around a corner or just pulling into my driveway i hear the noise
Clunking Noise in Steering Wheel My 2006 Chevy Malibu
when i turn the steering wheel and when i stop and hit bumps. When
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My 1998 Chevy Malibu Blower Motor Keeps Going Bad
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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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