Possible causes
– High fuel pressure
– Low fuel pressure
– Damaged FRP sensor
– Excessive resistance in the circuit
– Low or no fuel
– Wiring harness connector of the fuel pressure sensor
– Fuel Rail Pressure Sensor
– Vacuum leaks
– Fuel
– Low fuel pressure
– Damaged FRP sensor
– Excessive resistance in the circuit
– Low or no fuel
– Wiring harness connector of the fuel pressure sensor
– Fuel Rail Pressure Sensor
– Vacuum leaks
– Fuel
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine will not start
– Engine will not start
P0191 FORD OBD Code Description