Fault Codes/Power Solutions International, Inc./520Power Solutions International, Inc.520UnclassifiedGeneralWhat This Code Means520Possible Causes•Oil pressure 15 psi or less with engine RPM less than or equal to 1,400 rpm•Oil pressure 30 psi or less with engine RPM greater than or equal to 1,450 rpmRelated Power Solutions International, Inc. Fault Codes524563326606223643222685219686165 3891 4Browse all Power Solutions International, Inc. fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 520 on your specific Power Solutions International, Inc. unit — cited to the OEM manual, not a forum guess.TRY IT FREE