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The oil pressure light comes on when i idle down the engine and one time it shut down and would not start back i let it sit for several hours and it started back and is running fine but the oil light still comes on when i idle it down
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The oil light has nothing to do will oil level, but rather oil PRESSURE. If the engine oil is full and there is no rattling or banging noises in the engine, chances are the oil pressure sending unit is bad. If noises accompany the light, then shut down the engine and troubleshooting the engines internal lubrication system.
May need a new oil pressure switch,it's located next to oil filter,remove electrical connector then part.You may have to remove oil filter to remove part.
Sometimes that light means overfill oil
Sometimes after changing oil if they put too much that happens
Check the oil level on cold in level place (give it like an hour or so) for the light to reset
If after that the light still on take it to a tech.
How many miles are on the motor? Are you using the correct weight oil?
As oil warms, it gets thinner, and the pressure will drop as a result. When you say the pressure comes back after re-starting, is that after the vehicle has been sitting long enough for the oil to cool down, or does the pressure come back if you shut down and immediately restart?
Does the oil light come on BEFORE the engine shuts down? I have to ask because it is NORMAL for the oil light to be on when the engine is not running. I had a customer that said the same thing just last week. After we wasted a bunch of time (which the customer ended-up paying for) checking the oil level, the oil pressure, and verifying correct oil pressure gauge, light, and sending unit operation, it turned out that the crankshaft position sensor was bad and causing the engine to shut down and it had absolutely NOTHING to do with the oil light - it was functioning as designed.
If the oil light is coming on before the engine shuts down, the first thing you need to do is check your oil level. If the oil level is OK, you need to check the oil pressure with a gauge to determine if there is an actual engine oil pressure problem or if the oil pressure sending unit, gauge or light is malfunctioning. Also, it is highly advisable to not drive the vehicle AT ALL if the oil pressure light is coming on while driving until the cause of the light coming on has been determined and repairs have been made. Otherwise, SEVERE ENGINE DAMAGE may result.
could be bad water pump,leaking anti freeze,may have blown the head gasket as result overhaeting engine,check oil for milky gray color,or see if coming out exhaust if so blown head gasket,have someone help you check it out
What causes this is ussually the oxygen sensor. It works when the engine heats up and if its no good, it will run your engine lean or even shut it down. check them and replace them. They should be done every 2 years.
when you press the brake pedal the brake master cylinder vacuum booster takes vacuum away from the engine and that slows the idle speed just enough to trigger the low pressure oil light. Pull the oil pressure sending unit out and hook up an oil pressure test gage, if the pressure is above 15 PSI hot engine idle in drive replace the oil pressure sending unit.
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