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