Skip the auto shop - Our mechanics make house calls

Q: Code 102 Mass Airflow Low Volts - 1998 Pontiac Grand Prix

asked by on

When I unplugged the mass Air flow sensor my car stalls does that mean the sensor is bad

My car has 220000 miles.
My car has an automatic transmission.

Hello. The diagnostic code you are receiving is telling you the circuit is is not functioning within its normal voltage range. This is typically due to the sensor being bad, a faulty connection, or a dirty sensor. You can start be removing the sensor and attempting to clean it. Then reinstall and drive the vehicle for a few minutes to see if the warning light or code reappears. If it does, the mass airflow sensor will need to be replaced.

Removing the sensor and having the engine stall tells you the sensor is still performing part of its job, but is likely starting to fail or is contaminated. There is a chance the engine is having a more serious problem, but it very rare any of those issue would trigger this code. Clean the sensor, or replace it.

To avoid any unnecessary repairs, consider YourMechanic, as one of our mobile technicians can come to your location and give you a more personal diagnoses of your stalling issue. Best of luck.

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!

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: Why is my car stalling when I try and start it?

While the condition of your cooling system is certainly not healthy, it may or may not be related to the stalling issue. It is possible that due to the condition of the coolant, or merely coincidence, the coolant temperature sensor...

Q: Went with bigger tires & installed a high flow filter/muffler

Anytime you make changes to the tire's overall diameter, multiple components are going to be thrown out of calibration including, ABS, speedometer and traction control. There was a time when a professional mechanic could reset ECU's, but recent changes in...

Q: Truck not starting after engine removal.

There are countless reasons your truck may not start. This is especially true since everything in the engine compartment got disturbed when you took the engine out. If you engine doesn't crank at all, or cranks slowly, suspect a problem...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...