Q: While driving car bucked then dropped speed, shut it off and now it won't start again.

asked by on

I was doing about 65mph on the highway when my car bucked and speed started dropping my check engine light had been on previous to this and I was told I needed a new o2 sensor, was waiting till payday to get that done. When he car bucked it also made a ding noise and my oil light came on. Pulled to the side of the highway and shut it off, then couldn't restart it. It sounds like it wants to start but just gives me the "whurr whurr " sound. All my dash lights and radio and headlights work totally normal. I don't need an oil change I just had one end of November and have only driven maybe 800 miles on it. They topped off all my fluids when they did the oil change and changed my air filter as well. I have a bunch of "Facebook mechanics" telling me it could be this and hat but I'm looking for a real mechanics opinion. Any thoughts of what killed my car?

My car has 126000 miles.
My car has an automatic transmission.

Hi There, 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 upon 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. Any of the above problems may cause the car to jerk and possibly even shut down depending on the severity. When the engine shuts down, this will also cause the oil light to come on as the oil pressure will have dropped as a result of the engine no longer running. I would suggest having an expert from Your Mechanic come to your location to diagnose and inspect your vehicle.

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. While driving car bucked then dropped speed, shut it off and now it won't start again.

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 have a 2010 Hyundai Elantra. How often do you recommend the changing of the timimg belt?

The tensioner and the timing belt should be replaced every 60,000 miles. This is an "interference" engine application which means that if the timing belt were to break when the engine is operating, the valves could interfere with the pistons...

Q: How do I remove the key fob from the ignition switch?

Removing the key from the ignition switch is very easy. First, if your vehicle has an automatic transmission, make sure that it is in PARK. Then, turn your key fob counter-clockwise to the farthest setting, OFF. Then pull the key...

Q: Antifreeze coming out

Hi there. It is possible you may need to replace your thermostat. The thermostat opens when the car gets warm to allow more coolant to flow through the cooling system. When it fails, it can become stuck closed and will...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...