P0451

DTC P0451 - EVAPORATIVE EMISSION CONTROL SYSTEM PRESSURE SENSOR RANGE/PERFORMANCE PROBLEM

DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault.

CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE and INSPECTION MODE. Refer to How To Clear Diagnostic Trouble Codes.




WIRING DIAGRAM

11AK1: CHECK ANY OTHER DTC ON DISPLAY.

CHECK: Is there any DTC on display?

YES: Inspect the relevant DTC using "11. Diagnostics Chart with Trouble Code for 2500 cc Models".

NO: Go to step 11AK2.

11AK2: CHECK FUEL FILLER CAP.
1. Turn ignition switch to OFF.
2. Open the fuel flap.

CHECK: Is the fuel filler cap tightened securely?

YES: Go to step 11AK3.

NO: Tighten fuel tiller cap securely.

11AK3: CHECK PRESSURE/VACUUM LINE.

NOTE: Check the following items.
- Disconnection, leakage and clogging of the vacuum hoses and pipes between fuel tank pressure sensor and fuel tank.
- Disconnection, leakage and clogging of air ventilation hoses and pipes between fuel filler pipe and fuel tank

CHECK: Is there a fault in pressure/vacuum line?

YES: Repair or replace hoses and pipes.

NO: Replace fuel tank pressure sensor.