Q: Occasional hesitation and shaking, brakes engage randomly

asked by on

While driving at higher speeds, my car occasionally starts hesitating and shaking. I went to the dealer and had the throttle checked along with the transmission and everything seems to be working correctly. However, my brakes seem to be engaging randomly for a brief moment. What could be causing this?

Hello. I suggest to inspect two components for possible faults. It is possible that the accelerator pedal position sensor is improperly translating pedal position which will greatly impact the air-fuel ratio negatively which could cause a hesitation.

I’d suggest getting help from a certified technician who will diagnose your trouble codes with a scan tool capable of reading live data. They can then drive the vehicle and take note of the data from components such as the pedal position sensor, mass airflow sensor, and the throttle position sensor. Each of those sensors could cause a hesitation if faulty because the air fuel ratio will be applied incorrectly. I would also recommend checking the condition of the spark plugs because your concern is likely ignition or air fuel ratio related.

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. Occasional hesitation and shaking, brakes engage randomly

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: No codes, vibration at idle

I might recommend using a bottle of fuel injector cleaner in the gas tank and some Seafoam in the oil. Those together will normally smooth out any rough idle that can be fixed with cleaners.

Q: EVAP Vent valve solenoid code p0449

This suggests you may have a bad EVAP control module. A battery voltage is supplied to the evaporative emission (EVAP) canister vent solenoid valve. The control module grounds the EVAP canister vent solenoid valve control circuit to close the valve...

Q: Q: What does the brake Warning Light mean?

The brake Warning Light is located on your instrument panel. This light will illuminate for two reasons: the parking brake is engaged, or the brake fluid is low. When you notice that the light is on, disengage your parking brake....

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...
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...
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...