Q: Why is my car not accelerating?

asked by on November 16, 2016

I start the car and when it's in drive or park it's not doing anything
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 YourMechanic come to your home to diagnose the issue firsthand and service your throttle control system.

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

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

Gear shift not going into gear

It sounds like your shifter assembly may be broken. I would recommend having the shifter replaced by a professional. This would require removing the steering column and a few other trim piece in order to access the bolts that mount...

My 2009 Dodge Ram Hemi 2500 makes a loud rumbling noise in the front end. I stop giving it gas couple times and it goes away

Hello, thank you for writing in. The noise may be coming from a number of issues with the vehicle. Considering the loss of power, you want to focus on the exhaust, air intake, and spark systems. An exhaust leak or...

Plastic key in ignition

Hello, The metal key and plastic housing both need to be intact for the vehicle to start. The plastic housing holds a computer chip which sends a signal to the anti-theft system to start the vehicle. The metal key acts...

Related articles

How Are Car Sensors Protected From Heat and Debris?
Reliable car performance depends on sensors to collect and relay data. Some car sensors can be cleaned to make them work reliably again.
The Top 5 Selling Cars in Kansas in 2012
Kansas Kansas sees a varied climate with all four seasons, which means drivers in the area choose a variety of vehicles. In years past, some of the front-runners have included the Ford F-150, Buick and Toyota Camry. 2012’s top five...
Top 10 PZEV Cars for Eco-Friendly Drivers
Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. You’d think it’d have to either be zero-emissions or not in the category at all. But as contradictory as...