Possible causes

-Fuel leak
-Fuel filter
-Transfer pump flow
-High pressure fuel pump
-Leaking fuel injectors or connectors
-Leaking pressure limiting valve
-Fuel control actuator
-Fuel pressure sensor
-Restriction in fuel return lines
-Cascade overflow valve
-Air in the fuel system.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1011 OBD Code Description

P1011 Code is set the Engine Control Module (ECM) detects that the fuel pump delivery pressure to low.