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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L> 13A-237 Test Conditions B: Fuel tank differential pressure sensor output voltage is more than the lower • Intake air temperature is higher than 5 ° C (41 ° F.) • Engine speed is 1,600 r/min or more. • Volumetric efficiency is between 25 and 80 • Vehicle speed is 30 km/h (18.7 mph) or more. • Evaporative emission purge solenoid is not °Χ (41° F) or more. Judgment Criteria B • The sensor output voltage remains less than 1.0 TROUBLESHOOTING HINTS • Fuel tank differential pressure sensor failed. • Open or shorted fuel tank differential pressure • PCM failed. • Blockage of evaporative emission system OVERVIEW OF TROUBLESHOOTING • The DTC P0450 can be set if either of the 1. Faulty fuel differential pressure sensor, related circuit, or PCM. 2. Faulty fuel filler neck evaporative emission ventilation solenoid or blocked vapor line. • If the fuel filler neck evaporative emission • To check a system blockage, do a performance DIAGNOSIS Required Special Tools: • MB991502: Scan Tool (MUT-II) • MB991658: Test Harness Set |