Q: Car shuddering

asked by on February 25, 2016

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

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

I just had a air mass filter sensor put in my car 2011 on Nissan Altima plus a new air filter and the check engine soon light came on.

Hi there. Check the harness to the mass air flow sensor (MAF) and see if its connected correctly. Check all of the clamps around the sensor and make sure that they are all tight. The light is still coming on...

Wrench indicator light

The check engine light came on indicating a problem and the vehicle went into limp home mode. Once you turned off the car and turned it back on the problem was not present and the computer resumed normal operation. Thei...

My engine makes whirring sound when I start the car and turn the wheel but stops once the engine warms up.

Check to see if the fluid level in the power steering pump reservoir is adequate. Even if the fluid level is correct, the power steering pump could still be the source of the noise. You can figure it out quickly...

Related articles

How Do I Look Up What Different Codes Mean?
You’re You’re driving your car and everything is going fine when, suddenly, the Check Engine Light comes on. You head home and get out your trusty code reader. You connect it to the OBD II connection under the dash, and...
P0694 OBD-II Trouble Code: Fan 2 Control Circuit High
P0694 means that the circuit voltage fell more than 10% away from the manufacturer specifications due to a faulty fan motor or relay.
P0441 OBD-II Trouble Code: Evaporative Emission Control System Incorrect Purge Flow
P0441 code definition The P0441 diagnostic trouble code will be set when a malfunction is detected within the EVAP control circuit. This...