1998 Saturn SL1 P0446 and P0446 pd

Tiny
BBARBO9
  • MEMBER
  • 1998 SATURN SL1
  • 1.9L
  • 4 CYL
  • FWD
  • MANUAL
  • 260,000 MILES
I just purchased a vent solenoid because I was told that would fix it. But it didn't help I put it on and erased codes and it just came right back on I repeated that a few times and it still is on after about 15 miles. Please help me out
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Sunday, June 1st, 2014 AT 12:26 PM

44 Replies

Tiny
SATURNTECH9
  • EXPERT
Do you have a multi meter to do some testing?
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Sunday, June 1st, 2014 AT 1:40 PM
Tiny
BBARBO9
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No I do not
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Sunday, June 1st, 2014 AT 1:59 PM
Tiny
BBARBO9
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What do you think it is I believe my friend has one
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Sunday, June 1st, 2014 AT 2:21 PM
Tiny
SATURNTECH9
  • EXPERT
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?
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Sunday, June 1st, 2014 AT 2:36 PM
Tiny
BBARBO9
  • MEMBER
Which fuses should I check?
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Sunday, June 1st, 2014 AT 2:41 PM
Tiny
BBARBO9
  • MEMBER
P0446 Evaporative Emission Control System Vent Control Circuit
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Sunday, June 1st, 2014 AT 2:49 PM
Tiny
SATURNTECH9
  • EXPERT
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.
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Sunday, June 1st, 2014 AT 2:49 PM
Tiny
BBARBO9
  • MEMBER
I don't see a emission fuse but all of the fuses looked fine
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Sunday, June 1st, 2014 AT 3:26 PM
Tiny
BBARBO9
  • MEMBER
So could it be wiring somewhere
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Sunday, June 1st, 2014 AT 3:46 PM
Tiny
SATURNTECH9
  • EXPERT
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.
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Sunday, June 1st, 2014 AT 4:00 PM
Tiny
BBARBO9
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How do I check all of that?
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Sunday, June 1st, 2014 AT 8:57 PM
Tiny
SATURNTECH9
  • EXPERT
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.
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Sunday, June 1st, 2014 AT 9:04 PM
Tiny
BBARBO9
  • MEMBER
There is power to the canister
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Monday, June 2nd, 2014 AT 1:13 PM
Tiny
SATURNTECH9
  • EXPERT
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?
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Monday, June 2nd, 2014 AT 1:19 PM
Tiny
BBARBO9
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The ground was showing -11
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Monday, June 2nd, 2014 AT 1:41 PM
Tiny
SATURNTECH9
  • EXPERT
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.
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Monday, June 2nd, 2014 AT 6:42 PM
Tiny
BBARBO9
  • MEMBER
So its the pcm?
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Monday, June 2nd, 2014 AT 6:42 PM
Tiny
BBARBO9
  • MEMBER
Do you mean the sensor?
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Monday, June 2nd, 2014 AT 7:07 PM
Tiny
SATURNTECH9
  • EXPERT
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.
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Monday, June 2nd, 2014 AT 7:12 PM
Tiny
BBARBO9
  • MEMBER
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
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Monday, June 2nd, 2014 AT 7:35 PM

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