2003 Chevy Silverado 2500HD The check engine light came on and gave a P0443 code. It says it could be 1 of 4 things: 1 Purge or vent solenoids defective 2 Check connector and wiring 3 Fuel saturated vapor canister 4 Failed EVAP vent solenoid How do I go about checking these things?

DTC P0443
Circuit Description
An ignition voltage is supplied directly to the evaporative emission (EVAP) canister purge valve. The EVAP canister purge valve is pulse width modulated (PWM). The scan tool displays the amount of ON time as a percentage. The control module monitors the status of the driver. The control module controls the EVAP canister purge valve ON time by grounding the control circuit via an internal switch called a driver. If the control module detects an incorrect voltage for the commanded state of the driver, this DTC sets.


Suggest you view video's on youtube for testing PCM/ECM drivers , scanner danner videos . You may have a fried driver . The computer isn't controlling it .

Check Engine Light? EVAP Purge Control Valve Circuit Malfunction - P0443 - YouTube

How to test a purge solenoid (Mazda P0443, P0455) - YouTube

First......clear those codes and see if they return before doing anything.Purge valve is on the vent line from tank to engine ,usually in the engine compartment,and vent valve is on the line from tank to outside air,usually by the fuel tank.Don't change any parts until you check them and their circuits with a good scan tool.

code p 0443 refers to evaporative emission (EVAP) canister purge valve--circuit malfunction===causes--wiring--EVAP canister purge valve--ECM
code p 0446 refers to EVAP system vent control--circuit malfunction===causes wiring---EVAP purge valve ---ECM
check the wiring and connection to the purge valve unit

OBD-II Trouble Code: P0443 Evaporative Emission Control ...

www.obd-codes.com/p0443

P0443 - Evaporative Emission Control System Purge Control Valve Circuit ... P0443 trouble code symptoms could be just an malfunction indicator lamp (MIL) ... But, it's also possible to have a lean condition or a rough running engine if the ...Missing: jaguar ‎xj6

P0443 OBD-II Code and Check Engine Light - Jaguar Forums - Jaguar ...

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Feb 24, 2014 - Anyone have an idea on where to look for this? Jaguar® Leasing Deals.... P0443 OBD-II Code and Check Engine Light-xj8-purge-valve. .... Newby with air suspension fault, philwarner, XJ XJ6 / XJ8 / XJR ( X350 & X358 ), 7 ...Missing: 1995

Error code p0443..Think dealer is on crack - F150online Forums

www.f150online.com/.../287418-error-code-p0443-think-dealer-crack.h...

Code po443 is for EVAP purge solenoid malfunction which will cause the car to stall. Also over filling gas also causes the EVAP canister to choke with excess gas.
Please perform the following test the component failure:-
Tests/Procedures: 1. Monitor the purge solenoid for having 12v Key On Engine Running (KOER).

2. Using a voltmeter attached to the White wire, monitor for 12v to come and go.

3. Check the purge solenoid for clicking at idle. Tech Tips: If the voltage is alternating from 12-0 volts, that indicates that the ECM is trying to trigger the solenoid. If there is no clicking, the solenoid is faulty.

Error Code: P 0443
Description:
Evaporative Emission (EVAP) Canister Purge Valve - Circuit Malfunction
Problem Area:
Wiring, or VSV connector loose or detached.
Evaporative emission (EVAP) canister purge valve.

O2 sensor circuit. No activity detected. Bank 2 sensor 2. Take it back to the garage. They did something wrong.

any luck on this yet i have the same problem

After putting more fuel in the vehicle
Open the hood
On the righthand side of the engine just to the side of valve cover, back by the firewall you will find a round plunger about 1 1/2" in diameter. The plunger will push down and come right back up on its own. Push the plunger rapidly till the pushing gets firmer or stiff.
Start it up. Sometimes it will have to be done a couple of times. I actually fined it works best to pump it firm and then have someone else start it while you keep pumping it. If you do it this way make sure your body is clear of all moving parts.
This is a very fast way of getting it going
Good luck

maybe a fuse is blown? did you have the mechanic check the fuses? or even check all your relays and wiring?