Q: oil light on. Will not start.

asked by on

I got a oil light and it started to make a knocking noise. Pulled over and it started smoking from the oil cap. We added oil and coolant (has a leak) and went to start her up, and it will turn over but will not start. It acts like it wants to but will no actually do it. Is this something that can be fixed?

My car has 156000 miles.
My car has an automatic transmission.

The low oil level and knocking noise may be very likely related in that this may have caused a number of things to fail such as crankshaft bearings or rod bearings. Depending on the severity of this, it may have damaged a crankshaft journal as well. Low oil combined with low coolant creates an extremely hot motor, causing damage to many different components. This also can cause the cylinder head gasket to fail as well which in turn creates a compression leak that may be responsible for the engine not starting now. When this happens, the cylinders will not generate enough compression to create the proper combustion for the engine to start. If you need assistance, a certified YourMechanic technician can help inspect your vehicle’s starting issues in relation with this knocking noise and suggest any necessary repairs.

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. oil light on. Will not start.

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: The air conditioner doesn't work only when idle, works great when moving.

Hello. The most common cause for this is a low refrigerant charge. There could be a problem with a sensor or even a wiring issue, but it is most common for there to be a minor leak in the system...

Q: ABS and brake lights flashing

This indicates there is a problem in the anti-lock braking (ABS) system. In this system, the ABS control module monitors wheel speed via sensors. If, from the sensor signals, the module determines wheel lockup is about to take place, it...

Q: Oil light on and dinging sound, oil is a quart low, engine running good

If you can, then top off the oil from being low. If the light does not go out, then see if you hear any abnormal engine noise. If the engine is making a rattling or any other abnormal noise then...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.