I have a purge valve or VMV fault code 1443 EVAP vaccuum system error

https://garatos.com/p1443-ford-code/

code p 0440 refers to evaporative emission (EVAP) system---malfunction===causes ---hose connections ---intake leak---EVAP canister purge valve
probably the purge valve needs replacing

code p 0172 refers to system too lean, bank 1===causes --intake blocked , EVAP canister purge valve ---fuel pressure ---EGR system---injector/s HO2S
you will notice that the purge valve is in both codes and it also affects the fuel pressure by not venting the tank correctly
That will account for the fuel pressure problem
I would seek advice from an accredited service specialist that works on your type of car but I would be paying attention to the common fault ( purge valve) before any thing else

Error Code: P0301
Description:
Cylinder 1 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P0302
Description:
Cylinder 2 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P1300
Description: Random Misfire
Possible Cause:
As above.

Fault Code:- P0443 Indicates a Power-train fault


The fault is generally due to a problem in the Emission Control area


Fault Description: EVAP canister purge valve circuit malfunction

Action of ECM:- ECM Default: - Canister purge inhibited - Adaptive fuel metering inhibited


After clearing the DTC, complete the Purge system monitor drivecycle
Check for a reoccurrence of fault DTC.

Possible Fault:- EVAP Canister purge valve to ECM drive circuit: open circuit, short circuit, high resistance EVAP Canister purge valve power supply circuit: open circuit, short circuit EVAP Canister purge valve operating vacuum hose leak / restriction EVAP Canister purge valve failure

Check fault codes here http://www.bluejag.co.uk/diagnosticcodes.php

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).

Hi Vanessa,

Diagnostic Test Code (DTC) P1443 has a "generic" description of "Very Small Or No Purge Flow Condition"
To put it very simply, the Powertrain Control Mdule (PCM) is commanding the Canister Purge (CANP) solenoid to open and purge the fuel vapors from your charcoal canister and fuel tank. Then it "looks" at data from the Purge Flow (PF) sensor to see if if the CANP solenoid complied with its command. This is not occuring as it should. (see the picture below to see how all these parts work together)

Here is a list of the possible causes of this code:
> Leaks in fuel tank, filler cap or vapor hoses
> Wiring harness circuits (CANP SIG, PF, PWR GND, VMV and VPWR)
> Faulty Canister Purge (CANP) solenoid
> Faulty Purge Flow (PF) sensor
> Faulty Vapor Management Valve (VMV)
> Faulty carbon canister
> Faulty PCM
The system must be diagnosed to find out which parts of the system are functioning correctly and which are not, so the fault can be found. The computer only knows that the data from the PF sensor is not what it should be - it does not know WHY.

DTC P0443 - Evaporative emission control system Canister Purge control valve (CANP) or vapor management valve (VMV) circuit malfunction.
Your cars computer is telling you there is a leak. But most of the time when the system is smoke tested, the tech comes up empty handed. This is because the leak is intermittent. There are several solenoids that can do this on your evap system. The purge valve and the vent valve are the most common. Looks like it is going to be your purge valve.

That said, it could be any of the following:

Bad purge solenoid (internal short or open)
Wiring harness chafing or rubbing another component causing short or open on control circuit
Connector worn, broken or shorted due to water intrusion
Driver circuit inside powertrain control module (PCM) is bad


Code P0443 - Evaporative emission control system Canister Purge control valve (CANP) or vapor management valve (VMV) circuit malfunction. The PCM expects to see battery voltage when the solenoid is commanded off and voltage under 1 volt when the solenoid is commanded on.

Enabling conditions: Run engine off and running self tests to check this code. Blocking Action: This code can block the following monitors: Fuel Control, O2 monitor, Catalyst Monitor, misfire monitor. Testing: Check to see if the purge solenoid will block vacuum when it's off and pass vacuum when it's turned on. Typical resistance is 50 to 100 ω.

Hope helps.

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Evaporative Emission (EVAP) Canister Purge Regulator Valve 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.
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.
VSV connector near air filter box disconnected.

Code is defined as:
EVAP Purge Control Solenoid '2' Circuit problem, the evap system control solenoid may have a fault or be inop. This could also in some cars be caused by a loose gas cap.

Ok i have the same make and model car.And had same problem but i was only needing new hoses. thwe code reader will not tell you if they are bad you just have to check this. The purge valve and canister is located under hood on passenger side behind bumper. look behind the light through the openings. You have to raise car up and do the repairs from under the bottom of the bumper.On passenger side under hood above the wheel fender and between the engine you will see a emmision line about the size of a pencil leads to the purge valve. the valve cost about $18.00 and canister cost around $75.00 at auto zone. The canister is the square box and sometimes you can take apart and clean it and put back together and it should work fine.