Skip the auto shop - Our mechanics make house calls

Q: Car shakes when I press accelerator

asked by on

My car has been in need of tune up for about 2 weeks now was getting ready to do it but as of the past week every time I step on the accelerator my car shakes and it doesn't always happen butt sometimes it'll run fine and others it'll Shake really badly and as soon as I take my foot off the gas it goes away but when I step back on it comes back

My car has 102675 miles.
My car has an automatic transmission.

This may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, the ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal. I would suggest having a professional from Your Mechanic come to you home to diagnose your throttle control system.

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: My car gas pedal seems stuck when pressing on it while in park or drive 1994 Honda Accord

Hi there - I believe the throttle body on your engine is worn out, specifically the throttle sensor portion of the unit (internal component). It needs to be replaced. I recommend a throttle body inspection performed by a mobile, professional...

Q: Lost first and second gear

Due to the design of this vehicle it is common for the shift linkage connecting bushings to fail because they rot out and bind until they come apart. When this occurs the shifter cannot properly move the shift mechanism inside...

Q: My transmission is shifting improperly from 1st to 2nd

Hi there. There are a few sensors that can cause this as well as some mechanical issues in the transmission. Even though the Check Engine Light is not coming on I always start by checking the computer for any codes....

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...