Impreza WRX 2.0L

Turn ignition on and listen for sound of fuel pump operation. If fuel pump operates for 2 seconds when ignition is turned on, check fuel injector circuit. See FUEL INJECTOR CIRCUIT  . If fuel pump does not operate for 2 seconds when ignition is turned on, check for diagnostic trouble codes (DTCs). See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 2.0L article.