Possible causes

– Faulty fuel pressure solenoid
– Fuel pressure solenoid harness is open or shorted
– Fuel pressure solenoid electrical circuit poor connection
– Faulty Engine Control Module (ECM)

When is the code detected?

The Engine Control Module (ECM) has detected an open in Fuel Quantity Solenoid circuit

Symptoms

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

CHRYSLER Technical Service Bulletins for P0091 code