Q: It sometimes shakes while driving.

asked by on

It doesn't always do this, but sometimes as I'm driving and the car shifts into 2nd. The car will start shaking it feels as it comes from the engine bay area but I shakes the whole car. It stops when I was off the gas. When I re-apply the gas it doesn't shake again. My check engine light isn't on when the car is started, but it comes on after a bit of driving. Sometimes it comes on as the car starts shaking or before it shakes. The code it gives is for a bad 02 sensor. Other than that shake the car is perfect

My car has 188890 miles.
My car has an automatic transmission.

The shaking you are describing is likely related to the intermittent fuel being supplied to the motor as a result of the faulty O2 sensor. As you may know, the oxygen sensors which are part of your emissions system read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based on this reading, this information is relayed to the car’s ECU which then makes a determination as to whether or not to add more or less fuel to the engine. When too much or too little oxygen is present, this will cause check engine light to come on. Too much oxygen may be present in the exhaust gas due to things like an exhaust leak, a vacuum leak, a faulty mass air flow sensor (causing a lean fuel condition) or faulty fuel injectors. Too little oxygen may be present in the exhaust gas may be caused by things like a clogged air filter, a failing mass air flow sensor (causing too much fuel to be introduced to the motor), bad fuel injectors or a clogged catalytic converter. When the O2 sensor is not working properly, this will cause false readings to be relayed to the computer causing inaccurate adjustments to be made to the intake and fuel system in your engine. I would suggest having an expert from Your Mechanic come to your home to diagnose your emissions 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
  1. Home
  2. Questions
  3. It sometimes shakes while driving.

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: Gas not making it to carburetor or fuel pump

A fuel pressure test will have to be conducted to see if enough fuel pressure is making its way to the fuel injection system. If not, the problem could be a bad fuel pump or a power to the fuel...

Q: Battery drains and gauges quite working

I would start with changing the battery first as this is a cheaper, less expensive fix to your potential problem and presents a greater chance that this is the problem. If this does not correct the problem, you may have...

Q: Car shudders when stopping

Hi There, What you are describing is a sign of warped brake rotors. When you press on your brake pedal, this activates a hydraulic pressure which forces small pistons inside your brake calipers to push the brake pads against the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...