P0442
DTC P0442 / P0455: Evaporative Emission Control System Leak Detected (Small Leak) / (Gross Leak)
System / Wiring Diagram
System / Circuit Description
While engine running, ECM closes EVAP canister vent valve and opens EVAP canister purge valve. If EVAP control system is in good condition, EVAP control system pressure that detected by fuel pressure sensor becomes down. After that, ECM closes EVAP canister purge valve leaving EVAP canister vent valve is closed. If EVAP emission control system is in good condition, the fuel tank pressure rises specified rate.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and tester, on a level road.
NOTE:
Check to make sure that the following conditions are satisfied when using this DTC confirmation procedure.
- Engine coolant temp. at engine start: Between -10 °C and 110 °C (14 °F and 230 °F)
- Intake air temp.: Between -10 °C and 60 °C (14 °F and 140 °F)
- Altitude (barometric pressure): 2020 m, 6650 ft or less (540 mmHg, 72 kPa or more)
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Drive vehicle at 40 mph (60 km/h) or more for 12 min.
5) Keep vehicle speed at 40 mph (60 km/h) for 3 min. (Throttle valve opening is kept constant in this step.)
6) Stop vehicle and check if DTC and pending DTC exists using scan tool. If not, check if evaporative system monitoring test has completed using scan tool. If not in both of the checks (i.e., no DTC / pending DTC and evaporative system monitoring test not completed), check vehicle conditions (environmental) and repeat step 3 through 6.
DTC Troubleshooting
WARNING:
This work must be performed in a well ventilated area and away from any open flames such as gas hot water.
1.
Was "Engine System Check" performed?
YES
Go to Step 2.
NO
Go to Engine System Check Engine System Check.
2. Check fuel filler cap for SUZUKI genuine parts, tightness and gasket for deterioration.
Are they in good condition?
YES
Go to Step 3.
NO
Tighten or replace fuel filler cap.
3. Check vacuum hoses for connection, leakage, clog and deterioration visually.
Are they in good condition?
YES
Go to Step 4.
NO
Repair or replace.
4. Check EVAP canister vent valve and its circuit referring to EVAP Canister Vent Valve and its Circuit Inspection EVAP Canister Vent Valve and Its Circuit Inspection.
Is check result satisfactory?
YES
Go to Step 5.
NO
Go to Step 10.
5. Check fuel level sensor and its circuit referring to P0461 DTC P0461: Fuel Level Sensor (Gauge) Circuit Performance Problem.
Is check result satisfactory?
YES
Go to Step 6.
NO
Repair or replace.
6. Check EVAP canister for clog and damage referring to EVAP Canister Inspection EVAP Canister Inspection.
Is it in good condition?
YES
Go to Step 7.
NO
Replace EVAP canister.
7. Check purge line, EVAP system component and fuel tank for leakage referring to Evaporative Emission System Leak Inspection Evaporative Emission System Leak Inspection.
Is check result satisfactory?
YES
Go to Step 8.
NO
Check and repair leaking point or replace malfunction part.
8. Check fuel tank pressure and temp. sensor for performance referring to Fuel Tank Pressure and Temp. Sensor Inspection Fuel Tank Pressure and Temp. Sensor Inspection. Flow.
Is it in good condition?
YES
Go to Step 9.
NO
Replace tank pressure and temp. sensor.
9. Check tank pressure control valve for operation referring to Fuel Tank Pressure Control Valve Inspection Fuel Tank Pressure Control Valve Inspection.
Is check result satisfactory?
YES
Intermittent trouble or faulty ECM.
Check for intermittent referring to Intermittent and Poor Connection Inspection.
NO
Replace tank pressure control valve.
10. Check EVAP canister vent valve for operation referring to EVAP Canister Vent Valve Inspection EVAP Canister Vent Valve Inspection.
Is check result satisfactory?
YES
"BLK/RED" or "BLU/WHT" circuit open or short.
If wire and connections are OK and scan tool is used in Step 4, substitute a known-good ECM and recheck.
NO
Replace EVAP canister air valve.