There is a simple step-by-step for diagnosing the problem.  Inspect your engine oil dipstick: If the dipstick is dry, it means there is no oil pressure, and you must check your engine oil level. If your dipstick is completely dry, you need to change your oil.  Check for leaks in your vehicle: Once you have done the engine oil level check, take a peek under the car to see any oil coming out of the engine. If there is an oil leak, you can check for the source of the leak and identify where it is coming from.  Take a look at your oil pump pulley: If the oil leak is coming from your engine, inspect your oil pump pulley, and it'll be where the oil is leaking from. Here's a quick fix to gasket leak.