2007 Chevrolet Tahoe 5.3L Vortec with engine code P0521

Question

On my 2007 Chevrolet Tahoe 5.3L Vortec, I changed the oil pressure sensor/switch, but the check engine light came back on. What can it be? And I put the scanner on and it gave me code P0521.

Answer 1

Hi there,

Since replacing the sensor hasn't solved the issue, it's likely a wiring problem. 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