What does OBD2 code P0091 mean?+
P0091 stands for Fuel Pressure Regulator Circuit Low. Fuel pressure regulator control circuit voltage is too low.
What causes code P0091?+
Short to ground in wiring; Faulty regulator; ECM output issue
How do I fix code P0091?+
Check for short to ground in wiring; Replace fuel pressure regulator; Test ECM output
How much does it cost to fix P0091?+
Estimated repair cost for P0091 is $150–$500.
Is P0091 DIY-friendly?+
P0091 typically requires professional equipment and a qualified mechanic.