Skip the auto shop - Our mechanics make house calls

Q: My 01' Tahoe want stay running when the MFS is plugged in I've put a new one on and new plugs too but it's doing the same thing

asked by on

My 01' Chevy Tahoe won't stay running when the MFS is plugged in I've got a code reader and the code that came back was P0174 I put new plugs in it and a new MFS but it's still doing the same thing but it runs good when the MFS is not plugged in
My car has an automatic transmission.

The mass air flow sensor (MAF) uses a heated wire to determine the amount of air entering the engine. It then relays this information to the powertrain control module (PCM), where it it used to determine fuel injector control. There are three wires going to the MAF on your vehicle: ground (black/white), power (pink) and the return signal to the PCM (yellow). A problem anywhere in this circuit can (including the PCM itself) can cause the problems you’re having. I recommend having a professional, such as one from YourMechanic, diagnose and repair the problem for you.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • My 01' Tahoe want stay running when the MFS is plugged in I've put a new one on and new plugs too but it's doing the same thing

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: Motor idles fine, when you give it gas it bogged down, already changed the plugs,wires,distributor cap and rotor

Hi there, thanks for writing in about your Chevrolet C1500. It's highly likely the mass airflow sensor is bad. To verify, a scan tool should be connected and observe voltage changes in the mass airflow sensor readings. Same for oxygen...

Q: My window will slowly roll up, but not completely.

Hi, thanks for writing in. The window regulator is most likely broken and no longer will lift the motor. I recommend having the door panel removed and check the window regulator to see if it is broken or the motor...

Q: AC Blower not Working

The most common failure for this problem is the blower control module (also known as the linear power module). The module should be replaced with a new one, after which you may notice the blower speeds higher than they were...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...