Skip the auto shop - Our mechanics make house calls

Q: Check engine light on, MAF sensor code on 2004 Chevrolet Avalanche

asked by on

I've been getting codes that indicate an issue with the MAF sensor. So, I had the MAF replaced. However, the dashboard shows the check engine light on despite replacing it. What could be the problem?

Hey there, thanks for writing in about your 2004 Chevrolet Avalanche. The Check Engine Light code received for the MAF sensor means that a pinpoint test is required on the MAF circuit. It does not necessarily mean the sensor is bad. You will need to have the system looked at more closely to make sure the proper repair is made. You may have a broken wire, shorted wire, or loose or corroded connections at the ECM. There are actually many possibilities depending on the actual code received. If you need help having this checked, a certified pro from YourMechanic can come to your car’s location to inspect the code more thoroughly and let you know what should be done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My check engine light goes on when I go up a hill or speed up then it goes off and on

If the vehicle is not overheating and the check engine light is NOT "flashing", and there are no other outward indications of the engine malfunctioning, it is safe to drive the car until it is convenient for you to request...

Q: Sudden Reduced Power when running fine - stop, restart, all is fine - what's wrong?

Hi there - first thing to check when experiencing a Reduced Power Light condition is for any problem codes that might still remain, even if the Check Engine light is not on now. There are several possible causes - an...

Q: After tire rotation thumping noise developed - 2006 Chevrolet Avalanche 2500 Automatic

The "thumping" sound you mention seems more like the torque convertor lock-up clutch in the transmission failing. It tries to lock up, can't recycles, etc. GM has a service bulletin on this problem - TSB Reference #3438A. Discuss this with...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...