Q: Car shuddering

asked by on

The VSA and Check Engine lights are on. My car is not accelerating properly, and it shudders and shakes.

When the vehicle stability assistance (VSA) control module detects wheel spin, it sends a request to the modulator unit to apply brake pressure to slow the spinning wheel. At the same time, it sends a signal to the traction control unit to reduce engine power. By doing this, the VSA system improves vehicle stability. If the VSA control module detects a problem in the system, it will illuminate the VSA light. On the other hand, the Check Engine Light comes on when the powertrain control module (PCM) has detected a problem in one of the powertrain systems. The symptoms you are experiencing (shuddering and poor acceleration) have dozens or potential causes. Retrieving the corresponding diagnostic trouble codes with dedicated equipment will help analyze both problems. I suggest having a professional, such as one from YourMechanic, service your vehicle to determine what repairs are needed to clear these lights.

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 shuddering

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: Engine light came on, code P0740, clutch converter circuit open!

Hey there, thanks for writing in about your 2004 Acura TL. A common transmission issue with this generation TL. No other way to say it but the transmission is on its way out. Acura does not recommend rebuilding or replacing...

Q: PO400 code came up with multiple cylinder misfires. I replaced the EGR solenoid, all the vacuum lines, cleaned the EGR pipe and passage. Still have the same problem.

Hi there. After having the EGR (engine gas recirculation) valve replaced, the vacuum lines replaced, and the tubes cleaned out, then there could be an electrical issue with the EGR system. Check the EGR harness with a digital meter and...

Q: My Jeep has a full battery but is not starting every time I go to start the car.

Hi there. There are several possible causes for the lightening bolt to remain on. The PCM (powertrain control module) has recognized an electrical fault in the ETC (electronic throttle control) system and disables the starter relay, creating a no crank...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...