Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
P0521
- The engine oil pressure is out of its working range.
- The ECM does not detect a change in the engine oil pressure.
- The engine oil pressure is outside of a calculated working range determined by engine speed and temperature.
- One of the above conditions are present for greater than 4 seconds.
P0522
- The ECM detects that the EOP sensor signal circuit is less than 0.1 V.
- The above condition is present for greater than 10 seconds.
P0523
- The ECM detects that the EOP sensor signal circuit is greater than 4.4 V.
- The above condition is present for greater than 10 seconds.