Q: Car runs with the mass airflow sensor unplugged. If you plug it in it will die if the car is running.

asked by on

If you unplug the mass air flow sensor the car will start. If you try to plug it in while it's running the car will die.

My car has 90000 miles.
My car has an automatic transmission.

This is a sure sign of a shorted mass airflow sensor. The reason it starts with it off is the computer sees no mass air signal and replaces it with an internal memory fake signal to use. This will let it start and will run well enough to get to a service repair place. Leave it disconnected for too long without getting it fixed can start to foul spark plugs and will have other different driving issues. If you need some assistance with this, consider YourMechanic, as one of our mobile technicians can come to your home and replace your mass airflow sensor.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car runs with the mass airflow sensor unplugged. If you plug it in it will die if the car is running.

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: 2007 Pontiac Torrent door not opening from inside

There are a couple of possibilites here. One is that the handle on the inside is broken, this is also the most likely issue. Another is that the linkage from the handle to the latch has failed. This could be...

Q: What would your advice be to a person who needs to get a smog check on their car to make sure it passes the smog check? 2005 Mitsubishi

Hi there - the most straightforward and least expensive approach to this problem is to simply take your vehicle in for testing 15-30 days prior to your "deadline" (birthday month?). Most states or metro areas allow a 30 day "repair...

Q: Q: Car jerking

The hole drilled into your MAF sensor has altered the metered reading of air being injected into your car. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor....

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.