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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-691 STEP 22. Test the OBD-II drive cycle. Diagnostic Function − OBD-ll Drive Cycle − Procedure 1 − Evaporative Emission System Leak Monitor (2) Read the diagnostic trouble code. YES : Go to Step 2. DTC P0452: Evaporative Emission Control System Pressure Sensor Low Input AC001944 CHECK VALVE A CHECK EVAPORATIVE FUEL TANK EVAPORATIVE EVAPORATIVE EMISSION INTAKE MANIFOLD SYSTEM DIAGRAM <VEHICLES WITHOUT INTAKE MANIFOLD TUNING SYSTEM> A B C D E F G Q R I H K J L N O M P AG FUEL TANK DIFFERENTIAL |