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1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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dave7182
New User
Jul 2, 2014, 5:11 AM
Post #1 of 9
(2201 views)
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1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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05/11/2013 - I bought the car with 174K miles in Texas.
06/14/2013 - Failed inspection, requiring the following repairs:
Replace EGR Valve & clean ports.
Replace Radiator, Thermostat, and Gasket.
Replace R & R Coolant Temp Switch
06/25/2014 - Passed inspection (181K miles), and have observed no problems of any kind.
07/01/2014 - "Service Engine Soon" light comes on.
Scanner shows code P0401 (EGR "A" Flow Insufficient).
Coincidentally, my cigarette lighter stopped working at the same time.
I still have observed no problems starting or running the car.
I would appreciate any advice as to what I should do.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jul 2, 2014, 6:09 AM
Post #2 of 9
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Re: 1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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The P0401 needs to be troubleshot to find out why the code is coming up. Qualified drive-ability tech should be be able to find the culprit and solution.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 2, 2014, 7:50 AM
Post #4 of 9
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Re: 1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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Just for laughs fix the cig lighter. Most likely a fuse or caused by something that fell in it if possible so look first. Is that involved - dang well shouldn't be but I smell a coincidence?
T
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Discretesignals
Ultimate Carjunky
/ Moderator
Jul 2, 2014, 12:31 PM
Post #5 of 9
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Re: 1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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Really don't think the cigar lighter has anything to do with it. Have you checked the 20 amp cigar fuse in the instrument panel fuse block?
You may have a plugged up ports again. The P401 code means the engine computer had commanded the EGR valve to open, but didn't see a drop in manifold vacuum. If the engine is burning oil or running too cold, that will coke up the EGR ports.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 2, 2014, 12:32 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 2, 2014, 3:41 PM
Post #6 of 9
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Re: 1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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I don't think the lighter has anything to do with it but interesting if it happened at exact same time, that's all? T
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dave7182
New User
Jul 2, 2014, 3:51 PM
Post #7 of 9
(2136 views)
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Re: 1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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I found that the cigarette lighter fuse was blown, so I removed it and went to the auto supply store to get some new fuses.
On the way home, the "Service Engine Soon" light went out.
All the warning lights turn on, as they should, when the ignition key is turned to the ON position.
Tomorrow I will install a new fuse and see what happens next.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 2, 2014, 4:10 PM
Post #8 of 9
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Re: 1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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Bet new one blows right away. Would make me think back side of fuse block and how its fed power is AFUed somehow with some short someplace else completely maybe. Just thinking and probably shouldn't.
I guess it's more important as to WHY it blew in the first place. TX inspections I vaguely know matter by exactly where you are as to what gets checked or fails an inspection. No car should fail for any real reason rules or not. Here, MA even if this snapped out of it for some strange reason you would fail again as it would not fully be "ready" for a legit sticker until so many cycles of warm ups and cool downs plus restarts without a problem and then good to go. You would get a legal gimme for 30 days to go back a recheck.
Your call but if you get this try the dang fuse now as we head into a holiday weekend any funky parts may be impossible to get quickly, T
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 2, 2014, 10:57 PM
Post #9 of 9
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Re: 1999 Saturn SL1 1.9L 4Cyl SOHC Auto Trans OBD Code P0401
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We see a lot of blown lighter fuses lately, mostly due to all the electronic devices that people are plugging in these days, leading to overloaded circuits.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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