Diagnostic Procedure

DTC P0441 DIAGNOSTIC PROCEDURE TABLE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (Evaporative system related) been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE OR STORED DTCS Turn the ignition switch off then to the ON position (Engine off). Verify related pending code or stored DTCs. Is DTC P0443 present?	Yes	Go to the appropriate DTC inspection.
3		No	Go to the next step.
4	DETERMINE IF LEAK CONCERN OR BLOCKAGE CONCERN Perform evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION .) Is system test result failed?	Yes	Go to Step 6.
4		No	Go to the next step.
5	INSPECT PURGE SOLENOID VALVE STUCK CLOSED Inspect the purge solenoid valve for stuck closed. (See PURGE SOLENOID VALVE INSPECTION .) Is the purge solenoid valve normal?	Yes	Inspect the following parts for clogging. Vacuum hoses between intake manifold to charcoal canister Catch tank Charcoal canister Repair or replace the part, then go to Step 11. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION .)
5		No	Replace the purge solenoid valve, then go to Step 11. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION .)
6	LOCATE LEAK POINT Inspect the following for leakage using Ultrasonic leak detector. Charcoal canister Catch tank Fuel filler cap EVAP hoses and pipes Fuel tank Is leakage found?	Yes	Repair leakage or replace part, then go to Step 11.
6		No	Go to the next step.
7	INSPECT EVAP SYSTEM LEAK DETECTION PUMP Connect all disconnected connectors and hoses. Place clamp on EVAP system leak detection pump hose between EVAP system leak detection pump and air filter. Perform evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION .) Is test result failed (red light turns on)?	Yes	Go to Step 9.
7		No	Go to the next step.
8	CONFIRM EVAP SYSTEM LEAK DETECTION PUMP LEAKAGE Remove clamp. Perform evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION .) Is test result failed (red light turns on)?	Yes	Replace the EVAP system leak detection pump, then go to Step 10. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP REMOVAL/INSTALLATION .)
8		No	Go to the next step.
9	INSPECT FUEL PUMP UNIT INSTALLATION Remove the fuel tank. Visually inspect for damage, insufficient sealing or poorly installed pump unit. Is it normal?	Yes	Go to the next step.
9		No	Repair or replace the fuel tank or sealing, then go to the next step. (See FUEL TANK REMOVAL/INSTALLATION .)
10	PERFORM LEAK INSPECTION Connect all disconnected connectors and hoses. Perform evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION .) Is test result failed (red light turns on)?	Yes	Leakage still exists. Locate leak point and repair. Then go to the next step.
10		No	Go to the next step
11	VERIFY TROUBLESHOOTING OF DTC P0441 COMPLETED Start the engine and let it idle. Clear DTC using WDS or equivalent. Turn the ignition switch off. Perform the KOER self-test (using WDS or equivalent) or the HO2S heater, HO2S, and TWC Repair Verification Drive Mode (not using WDS or equivalent). (See KOEO/KOER SELF TEST .) (See OBD-II DRIVE MODE .) Is PENDING CODE of same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION .)
11		No	Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Is there any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
12		No	Troubleshooting completed.