Q: Car is on but the engine won't run

asked by on

The car is on but for some reason the car won't rev and the check engine light is on

My car has 119240 miles.
My car's transmission is unknown to me.

Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or wires and many other reasons. Due to the wide range of possibilities for the check engine light to come on, the best and most efficient way to narrow down the scope of what may be causing this is to have the vehicle hooked up to a scanning tool to download any potential fault codes that may have registered in the computer. This will allow a mechanic to determine more specifically what to look for in diagnosing your vehicle. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your check engine light to come on.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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 is on but the engine won't run

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: Changing odometers from displaying kilometers to miles

Hi there, thanks for writing in. All you need to do is just press the trip button on and hold it then you will see that the odometer will switch back and forth on the speedometer from metric to standard...

Q: What's wrong w/ my steering?

There are many, many components in the suspension that could account for the noise, some are not expensive to repair and all can be repaired right at your location. Thus, I encourage you to seek out a diagnostic and then...

Q: Something is draining battery. When I turn air conditioner on, the battery level drops. So could this be the culprit.

It sounds like you may have a bad alternator or voltage regulator that is not properly allowing the battery to charge or maintaining the charge. Turning on the AC puts an additional load on the entire system resulting in the...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...