Q: Car won't accelerate past a certain speed

asked by on

When my car hits a certain speed, I can't accelerate, or I begin to lose speed. The car may also shake/jerk at a full stop while my foot is on the brake. These issues happen frequently, but inconsistently.

You may be having a problem with the A pilar; the sunroof drain could be leaking water into some electrical connections in the driver’s side kick panel. The connections for the throttle position pedal sensor are there, which may have taken-on water, causing corrosion, which could be making the sensor give incorrect, erratic readings. I would recommend you have a mechanic, like one from YourMechanic, come and check it for you to see if this is your problem. An engine scan would indicate problems in the system, and would be the best place to find a path to repair.

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. Car won't accelerate past a certain speed

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: i just replaced my evap on my 2010 kia soull but the light is still on?

If you performed a repair, manually erase the code(s). If a code or codes return, the advice as to next steps will depend on exactly what codes are presently displayed as well as testing of components referred to in the...

Q: Try to turn on doesn't make a noise but battery is charged

A "no crank" situation can be caused by different components. The electrical portion of the ignition switch can be shorted, not signaling the starter to crank the engine. Also, the starter relay can be faulty. It can receive the "start"...

Q: Knock sensor 2009 Pontiac G3

Hi there - the knock sensor on this engine is under the intake manifold, just behind the power steering pump, and is best seen and accessed from underneath the car. For assistance with a replacement, have a knock sensor replacement...

Related articles

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...
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...
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...