P0441

GENERAL DESCRIPTION

The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The PCM controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for combustion. This valve is actuated by the purge control signal from the PCM and controls fuel vapor flow from the canister to the intake manifold.

DTC DESCRIPTION

Checking output signals from fuel tank pressure sensor under evap.system test, if fuel tank's vacuum is higher than prescribed threshold, PCM sets P0441 and then MIL(Malfunction Indication Lamp) turns on.

DTC DETECTING CONDITION





MONITOR DTC STATUS

NOTE:
Evaporative Emissions Systems (EVAP) Leak Tests can be run by the Scan Tool.

1. Install scan tool and IG "ON" and then clear DTC.
2. Select and press "EVAP.LEAKAGE TEST" mode in the scan tool.
3. Check if the vehicle is under test conditions as below [Fig 1].
4. If OK, Start engine and restart Evap.Leakage Test again[Fig 2]




5. Is the same DTC set after the Evap.leakage test with scan tool ?
YES
> Go to "Component Inspection" procedure.
NO
> Fault is intermittent, go to "Verification of vehicle Repair" procedure.

COMPONENT INSPECTION

1. Check PCSV for leakage
(1) Ignition "OFF"
(2) Disconnect the hose leading from the PCSV to the intake manifold at PCSV.
(3) Apply a vacuum at the nipple and verify that the PCSV holds vacuum.
(4) IG "ON" and perform ACTUATION TEST for PCSV with scantool(should hear a faint click from PCSV)
(5) Vacuum should be released.
(6) Repeat this procedure 4 or 5 times to ensure PCSV reliability.
(7) Is the PCSV working properly?
YES
> It was intermittent failure., go to "Verification of Vehicle Repair" procedure.
NO
> Substitute with a known - good PCSV and check for proper operation.
If the problem is corrected, go to "Verification of Vehicle Repair" procedure.

VERIFICATION OF VEHICLE REPAIR

After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History(Not Present) fault"?
YES
> System performing to specification at this time. Clear the DTC
NO
> Go to the applicable troubleshooting procedure.