P0521 Chevrolet -

Question

Changed descending unit holds pressure for about an hour while driving continues to fall while driving, saying stop engine, stop turn off engine then it's fine after driving for a while on the same speed pressure falls if you speed up pressure goes back up. What could be the problem

Answer 1

P0521 Oil pressure sensor

Oil pressure test has to be performed, what can cause this problem can be from crankshaft to oil pump, the best way to resolve is to do a oil pressure test.