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

asked by on November 17, 2016

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.

Warning Light is on Inspection $94.99 - $114.99 Get a Quote
Mass Airflow Sensor Replacement $188.36 - $786.53 Get a Quote
Car is stalling Inspection $94.99 - $114.99 Get a Quote

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.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How to tell if I need a new catalytic converter
Hey thanks for the question, and thats a really good one by the way. As technology has grown so has the demand for more fuel efficient cars that are more friendly on the environment. One way this is achieved is...
Headlights stay on
Hello. This sounds like the headlight switch is faulty. You might also want to check to make sure you have the headlight switch in either the auto position, or the off position. If the headlight switch is left in the...
Starter issue
The starter motor has a gear that comes into contact with the engine flywheel or flex plate and uses this connection to manually turn the engine over until it runs on its own. In many cases the starter can make...
Truck will crank, but engine won't start - 1973 Chevrolet K20
Hello there, thanks for writing in. The wiring diagram for the ignition system of your vehicle is pretty simple. Power flows from the ignition switch to the coil. When the engine is cranked, the points open and close to create...
Power loss, won't go up hill.
If your engine is revving but the vehicle is not maintaining speed on hills, then the transmission may be slipping (https://www.yourmechanic.com/services/gears-slipping-when-accelerating-inspection) due to internal clutches. Have the fluid checked (https://www.yourmechanic.com/services/transmission-fluid-service) by an expert to see if it is burned or...
Oil pressure - 2000 Jeep Grand Cherokee
Hello and thanks for your question. If your oil pressure gauge is showing low pressure all the time with the engine running, then the gauge may be faulty. If your oil pressure gauge is showing low at idle and when...
Over heating
This can be caused by a number of things such as low coolant levels, a faulty thermostat (https://www.yourmechanic.com/services/thermostat-replacement), or a failing coolant fan switch. As you may know the coolant fan switch (https://www.yourmechanic.com/services/cooling-fan-relay-replacement) helps to maintain the proper coolant temperature...
Car makes squeaking noise while brake is pressed and I'm still
I don't think this has anything to do with your brakes. You're probably experiencing an engine noise or a noise in one of the belt driven accessories. If it only occurs when the brake pedal is depressed, than it may...
Got a problem with the tail lights on 99 Lincoln town car
It sounds like you may have one of the filaments burnt in the brake light bulb (https://www.yourmechanic.com/services/brake-light-bulb-replacement). The brake light bulb has two separate filaments that receive power separately depending on the function. One is for the brake lights when...

Related articles

Symptoms of a Bad or Failing Crankshaft Position Sensor
Common signs of a faulty crankshaft position sensor include issues starting the vehicle, intermittent stalling, and the Check Engine Light coming on.
How Long Does an Electronic Spark Control Last?
The The job of the electronic spark control is to control the engine timing. This part can also be called the "knock sensor", as it monitors any unusual knocking, or vibration that may be happening in the engine. This is...
How Long Does an Evaporator Temperature Sensor (Switch) Last?
If If you have air conditioning in your vehicle, which pretty much all modern vehicles have, then you have an evaporator temperature sensor (switch). This switch plays an important role in making sure the correct temperature is attained, and that...