1998 Saturn SL1 p0446 and p0446 pd

Do you have a multi meter to do some testing?

No i do not

What do you think it is i believe my friend has one

I will have to look the code up when I get home thats a rare code on those cars doesnt c9me up often.I was asking about the multi meter so we could do some basic testing. But generally with a vent valve code you need a scan tool that can command the vent valve open and closed and a multi meter. Have you checked all the fuses?

Which fuses should i check?

P0446 Evaporative Emission Control System Vent Control Circuit

I would check all the ones in the underhood fuse box but off the top of my head theres a emissions fuse I n the underhood fuse box.

I don't see a emission fuse but all of the fuses looked fine

So could it be wiring somewhere

It could be the power wire to the valve or the ground control wire from the pcm or the pcm itself. With the key in the run position one wire will have battery voltage the other wire is the ground controled by the pcm.Thats where the scan tool that can command the vent valve open and closed would come in to check the ground side of the vent valve.

How do i check all of that?

The power side can be checked with a multi meter do you have one of those yet?The ground control the wire itself can be checked with the multi meter but the ground driver in the pcm you need a expensive scan tool that can command the vent valve open and closed.

There is power to the canister

Then you have a bad ground control wire or connection or a bad pcm.See if you have two ohms or less from the ground control wire at the canister connector to the pcm?

The ground was showing -11

How did you check the ground control wire and get that reading ?You were using dc volts scale on the meter across the two terminals at the vent solenoid?If you got 11 volts across those two terminals thats a issue.The geound side should only be ground when the pcm commands it ground . Otherwise the vent valve would always be closed.With the key in the run position if you plug and unplug the vent valve can you hear the vent valve open and close?It will be a loud click.

So its the pcm?

Do you mean the sensor?

How about answering my questions iam asking you?See my last post for the questions I need answers to. Remember this I cant see or test anything on your car your my eyes and hands.

Yes i know this so sorry and yes i did dc for the ground at the vent solenoid and it had a reading of -11and the plugging and un plugging do you mean the sensor

When you plug the vent valve in and unplug it can you hear it open and close?

So i know this is probably a stupid question but do you mean the sensor

Iam not talking about a sensor iam talking about the vent valve which is a valve that vents the tank or closes the tank.Its right there at the fuel filler neck pipe thats the connector where checking correct the one that goes to that?Also thats what you replaced?

Yes lol i was just making sure

So you want me to take the hose off or the whole solenoid?

No iam asking you to turn the ignition key to the run position and unplug and plug in the connector to the vent valve and listen if you can hear the vent valve open and close?

No i do not hear anything

I'm sorry for being so rushy but I've been trying to get this fixed because my regristration went out

Alright let's recap with the key in the run position you have about 11 volts across the vent solenoid connector?I want you to check the wires seperate not together first key in the run position touch the black meter lead to a unpainted metal part of the car.Then red lead to the power wire to the vent solenoid connector what does it read?Next key in same position touch the black lead to a unpainted part of the car touch the red lead to the ground side of the vent solenoid connector. Make sure the meter is set to 200 ohms setting not 200k setting.Let me know what it reads.

On both its just staying at 1 .

So on 200 ohms it just stayed at one for both i also ddid 200 vdc and positive said 90 and ground said 0

So with the key in the run position you got a ground on the power side?Also the ground side shouldn't be a constant ground its controlled by the computer to operate the vent valve. So with the key in the run position and plugging the vent solenoid connector in and out can you hear the vent valve clicking?

No the power side was 90 and the ground was zero and i do not hear it opening or shutting

I'm completely confused on this one

Iam completely confused also you said you had battery voltage on the power side and now you say its got 90 ohms to ground with the key in run position.

THE POWER IS 90! THE GROUND IS ZERO!

So with the key in the run position on one of the wires to the vent solenoid connector you dont have battery voltage? Iam really trying to understand what your reading on the wires.The ground side shouldn't show a constant ground all the time. But what doesnt make sense is if you have battery voltage to one wire and a less then 2ohms to the ground wire with the key in the run position. Then why the vent valve doesnt click when you plug and unplug it in.

Yeah the ground just stayed at zero. i don't understand either

Alright so the ground shows 0 ohms to ground does the power wire show battery voltage with the key in the run position?

Yes 90