Skip the auto shop - Our mechanics make house calls

Q: Car hesitates when accelerating.

asked by on

today wife was driving the car and said when she accelerates the car jerks. But then when at a steady speed it is fine.

My car has 186000 miles.
My car has an automatic transmission.

A: This is a common symptom of a failing mass ...

This is a common symptom of a failing mass air flow sensor. This is a unit that monitors the air and fuel mixture prior to being injected into the motor. When this is not working properly, this causes an imbalance in the air/fuel ratio which will cause the car to hesitate as you describe.

If you’d like to get this fixed, I would recommend having an expert from Your Mechanic come to your home to diagnose the hesitation while acceleration and help you fix it accordingly.

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: Hesitation

Hesitation is a common sign of a failing mass air flow sensor. This is a unit that monitors the air flow into the engine as it is mixed with fuel to create the optimum air/fuel ratio. When this is not...

Q: Car does not want to go into gear

I would recommend having a certified mechanic pull codes, inspect the oil pan for metal, and change the transmission fluid and filter. You may also need to flush the fluid from the torque converter, and have the valve body inspected...

Q: Running lights randomly turning on when car is off/blinker stick not staying in on position

The BCM would need to be tested to see if it is getting the proper signals from the headlight switch and turn signal switch. The BCM is a major problem and and has caused various problems with the vehicle in...

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...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...