P0521 Chevrolet -

Question

My oil pressure is fine when my 09 tahoe is cold but when I run down the highway my check engine light comes on and my oil pressure drops.
the code that shows up is P0521

Answer 1

HI there,

This code indicates an issue with the engine oil pressure sensor. Here is some info for you.

P0521 CHEVROLET - Engine Oil Pressure Sensor/Switch Circuit Range/Performance

Read more: https://www.autocodes.com/p0521_chevrolet.html