Possible Causes of P1011 Code
-Fuel leak
-Fuel filter
-Transfer pump flow
-High pressure fuel pump
-Leaking fuel injectors or connectors
-Pressure limiting valve
-Fuel control actuator
-Fuel pressure sensor
-Restriction in fuel return lines
-Cascade overflow valve
-Air in fuel system
How is P1011 Code Repaired?
Start by checking the “possible causes” listed above. Visually inspect related wiring harnesses and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Check engine light illuminated (or service engine soon warning light)
P1011 Meaning
When P1011 code is set, the engine control module (ECM) detects that the fuel pump discharge pressure is low.