DTC code

P0521: P0521 Diagnostic Guide

Vehicle-specific published guides for this diagnostic trouble code.

P0521 Diagnostic Guide

P0521 may indicate that the engine oil pressure sensor signal does not match the pressure behavior the engine controller expects.

Article vehicle: 2019-2025 Chevrolet Silverado 1500 5.3 gas

P0521 may mean the engine control module is seeing an engine oil pressure value that does not agree with the pressure value it expects.

Article vehicle: 2020-2025 Chevrolet Silverado 2500 6.6 diesel