Fuel evaporative emission check valve - Rocky Daihatsu Cars & Trucks

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
- Purge control VSV connector disconnected.
- Evaporative Emission (EVAP) Canister Purge Regulator Valve is faulty/jammed.
- Evaporative Emission (EVAP) Canister Purge Solenoid Valve faulty/jammed.
- Evaporative Emission (EVAP) Canister Sealing faulty.
- Pipes between Tank Breathing and Throttle Body leaky/blocked.
- Hose connection(s).
- Intake leak.
Solutions:
- Check Evaporative Emission (EVAP) Canister Purge Regulator Valve.
- Perform Output Test.
- Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve.
- Check Evaporative Emission (EVAP) Canister.
- Perform Basic Setting.
- Check Pipes between Tank Breathing and Throttle Body.

Error Code: P0440
Fault Location:
Evaporative Emission (EVAP) System - Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Soution:
Check Evaporative Emission (EVAP) System Sealing.
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.

Error Code: P0446
Fault Location:
Evaporative Emission (EVAP) System, Vent Control - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

Section 03-13: Evaporative Emissions 1995 Town Car, Crown Victoria, Grand Marquis Workshop Manual DESCRIPTION AND OPERATION Evaporative Emission Canister Fuel vapor emitted through the evaporative emission valve (9B593) is stored in two evaporative emissions canisters (EVAP canister) (9D653) . I think you should have 2 engine vacuum lines, one for each canister.


Evaporative Emission Canister Purge Valve


---------------------------------------------------------------
Evaporative Emission Tube Shut Off Valve The evaporative emission tube shut off valve (9G332) is located in-line between the evaporative emission valve (9B593) and the evaporative emissions canister (EVAP canister) (9D653) . The evaporative emission tube shut off valve control valve is mounted on the fuel tank (9002) by an integral bracket. The evaporative emission tube shut off valve closes the flow path from the evaporative emission valve to the evaporative emissions canister during refueling to prevent overfilling of the fuel tank .

Evaporative Emission Tube Shut Off Valve

what codes?

The vacuum lines run from the canister to the intake manifold. One is the purge hose to deliver stored fuel vapor to the intake to be burnd when engine is warm and you are crusing at part throttle. The other line is the vacuum line to operate it.

Fuel Vapor Valve, Aerostar (4.0L Engine) The evaporative emission valve (9B593) uses a small orifice, 1.83mm (0.072 inch), that allows vapors to pass into the vapor line running forward to the evaporative emissions canister (EVAP canister) (9D653). This evaporative emission valve mounts directly into the fuel tank (9002) using a fuel vapor separator seal. Fuel vapors trapped in the sealed fuel tank are vented through the orificed evaporative emission valve. The vapors from the fuel tank leave the evaporative emission valve through a single vapor line and continue to the evaporative emissions canister in the engine compartment for storage.
-----------------------------------------------------
Fuel Vapor Canister Purge Regulator Valve, Aerostar, Ranger Removal and Installation

1. Disconnect wire harness from evaporative emission canister purge valve (EVAP canister purge valve) (9C915).
   

1. Disconnect wire harness from thermistor.
   

1. Disconnect evaporative emission canister purge valve assembly from fuel vapor canister and throttle body.
   

1. To install, reverse removal procedure.
   

-----------------------------------------------------------------

CODE PO442 - EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED SMALL LEAK. LIST THINGS TO CHECK, CHECK FUEL FILLER CAP,CHECK FUEL FILLER PIPE PACKING,CHECK THE DRAIN VALVE,CHECK THE PURGE CONTROL SOLENOID VALVE,CHECK THE PRESSURE CONTROL SOLENOID VALVE,CHECK THE EVAPORATIVE EMISSION CONTROL SYSTEM LINE,CHECK CANISTER,CHECK FUEL TANK,CHECK ALL HOSES FOR DEFECTS LIKE CRACKS, BROKE PLACE OR DISCONNECTED. TO EVAPORATIVE EMISSION CONTROL SYSTEM.

That is a problem in the evaporative emission control system.
Could be anything causing it
Clogged filter in the charcoal canister
A leak in one of the vacuum lines
The purge valve not working,,,etc.
The best thing is to take it and have it checked out, they might have to do a smoke test to find the problem.
All they do is inject smoke into the system, if there is a leak the smoke will come out of it. All it takes is a pin hole in these emission systems to screw it all up.

P0446 Evaporative Emission System Vent Control Circuit.
The following are descriptions of all Evaporative possible codes:

P0441 Evaporative Emission System Incorrect Purge Flow
P0442 Evaporative Emission System Leak Detected (small leak)
P0443 Evaporative Emission System Purge Control Valve Circuit
P0444 Evaporative Emission System Purge Control Valve Circuit Open
P0445 Evaporative Emission System Purge Control Valve Circuit Shorted
P0446 Evaporative Emission System Vent Control Circuit
P0447 Evaporative Emission System Vent Control Circuit Open
P0448 Evaporative Emission System Vent Control Circuit Shorted
P0449 Evaporative Emission System Vent Valve/Solenoid Circuit
P0450 Evaporative Emission System Pressure Sensor/Switch
P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance
P0452 Evaporative Emission System Pressure Sensor/Switch Low
P0453 Evaporative Emission System Pressure Sensor/Switch High
P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent
P0455 Evaporative Emission System Leak Detected (large leak)
P0456 Evaporative Emission System Leak Detected (very small leak)
P0457 Evaporative Emission System Leak Detected (fuel cap loose/off)
P0458 Evaporative Emission System Purge Control Valve Circuit Low
P0459 Evaporative Emission System Purge Control Valve Circuit High
---
At least the cap isn't loose for the gas tank.

I would clear the code with an OBD-II Scanner 'erase code' button, and see how long it takes for it to come back.

Usually there is no access under the rear seat for safety reasons. Fuel Tank Removal & Installation 2002-2004 To Remove:

1. Relieve the pressure in the fuel system.
2. Lift the vehicle.
3. Remove the frame brace from the frame.
4. Remove the fuel tank shield from the fuel tank.
5. Drain the fuel from the tank into an approved container.
6. Loosen the fuel hose clamp and disconnect the hose from the fuel tank.
7. Disconnect the evaporative emission (EVAP) vent valve and fuel tank pressure sensor connectors. Evaporative emission cansister pipes removal and installation
   
   
8. Disconnect the evaporative emission (EVAP) vapor and vent valve pipes from the evaporative emission (EVAP) canister.
9. Disconnect the fuel return and feed pipes from the fuel tank.
10. To avoid system contamination, cap the evaporative emission (EVAP) and fuel pipes.
11. Use a jack to support the fuel tank. Fuel tank removal and installation
    
    
12. Detach the fuel tank straps from the frame.
13. Lower the fuel tank.
14. Disconnect the fuel sender connector.
15. Remove the fuel tank from the vehicle.

To Install:

1. Place the fuel tank under the vehicle.
2. Connect the fuel sender connector.
3. Attach the fuel tank straps to the frame. Torque the bolts to 24 ft-lb (32 Nm).
4. Remove the caps from the evaporative emission (EVAP) and fuel pipes.
5. Connect the evaporative emission (EVAP) vapor and vent valve pipes to the evaporative emission (EVAP) canister.
6. Connect the evaporative emission (EVAP) vent valve and fuel tank pressure sensor connectors.
7. Connect the fuel hose to the fuel tank. Torque the clamp to 22 in-lb (2.5 Nm).
8. Connect the fuel return and feed pipes to the fuel tank.
9. Lower the vehicle.
10. Refill the fuel tank.
11. Turn on the ignition for 2 seconds, with the engine off, and then turn off the ignition. After 10 seconds, turn the ignition back on with the engine off.
12. Lift the vehicle.
13. Check for leaks in the fuel lines.
14. Install the fuel tank shield onto the fuel tank.
15. Install the frame brace onto the frame.
16. Lower the vehicle.

2005-2007 To Remove:

1. Relieve the pressure in the fuel system.
2. Lift the vehicle.
3. Remove the frame brace from the frame.
4. Remove the fuel tank shield from the fuel tank.
5. Drain the fuel from the tank into an approved container. Evaporative emission cansister pipes removal and installation
   
   
6. Disconnect the evaporative emission (EVAP) canister fresh air, solenoid, and purge pipes from the evaporative emission (EVAP) canister.
7. Disconnect the fuel filler pipe recirculation hose from the fuel tank.
8. Loosen the fuel fill pipe clamp and disconnect the pipe from the fuel tank.
9. Disconnect the fuel feed and evaporative emission (EVAP) pipes from the fuel tank.
10. To avoid system contamination, cap the pipes.
11. Use a jack to support the fuel tank. Fuel tank removal and installation
    
    
12. Detach the fuel tank straps from the frame.
13. Lower the fuel tank.
14. Disconnect the evaporative emission (EVAP) vent valve, fuel tank pressure sensor, and fuel sender connectors.
15. Remove the fuel tank from the vehicle.

To Install:

1. Place the fuel tank under the vehicle.
2. Connect the evaporative emission (EVAP) vent valve, fuel tank pressure sensor, and fuel sender connectors.
3. Lift the fuel tank.
4. Attach the fuel tank straps to the frame. Torque the screws to 24 ft-lb (32 Nm).
5. Remove the caps from the pipes.
6. Connect the fuel feed and evaporative emission (EVAP) pipes to the fuel tank.
7. Connect the fuel fill pipe to the fuel tank. Torque the clamp to 22 in-lb (2.5 Nm).
8. Connect the fuel filler pipe recirculation hose to the fuel tank.
9. Connect the evaporative emission (EVAP) canister fresh air, solenoid, and purge pipes to the evaporative emission (EVAP) canister.
10. Lower the vehicle.
11. Refill the fuel tank.
12. Turn on the ignition for 2 seconds, with the engine off, and then turn off the ignition. After 10 seconds, turn the ignition back on with the engine off.
13. Lift the vehicle.
14. Check for leaks in the fuel lines.
15. Install the fuel tank shield onto the fuel tank.
16. Install the frame brace onto the frame.
17. Lower the vehicle.

Evaporative Emission (EVAP) Canister Purge Soleno Evaporative Emission (EVAP) Canister Purge Solenoid Valve is on top of the fuel tank.

Evaporative Emission (EVAP) Canister Vent Solenoid Valve is at the upper end of the fuel filler pipe.id Valve is on top of the fuel tank.

Evaporative Emission (EVAP) Canister Vent Solenoid Valve is at the upper end of the fuel filler pipe.