P1231 FORD – High Speed Fuel Pump Relay Activated

P1231 FORD Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1231 FORD Possible Causes

Faulty High Speed Fuel Pump,High Speed Fuel Pump harness is open or shorted,High Speed Fuel Pump circuit poor electrical connection

P1231 FORD Description

The Engine Control Module (ECM) energized the high speed fuel pump and detected no current flow on the circuit.