Nissan Repair Questions? Ask a Mechanic for Answers ASAP
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The oil is full?
Whats the pressure?
Is the noise present at any RPM?
How do you know the oil pressure is low if you havent checked it?
Where is the oil level on the dipstick?
You get the oil pressure by unscrewing the oil pressure sending unit and screwing an oil pressure tester into the hole that the sender comes out of then start the vehicle. The light flashing could be an electrical problem.
That or a bad timing control solenoid.
If its really low and making noise as a result it probably has bearing damage. That being the case it probably wont last long without a rebuild.