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Old 11-12-2016, 01:53 AM   #1
mattwithcats
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Join Date: May 2011
Location: Portsmouth, Virginia
Posts: 1,363

2002 SL2
Default P0301 code...

Turned cold again, so the Silver Surfer tossed me a P0301 code.
Did this last year when it got cold, reset it, tossed some Techron at it,
stayed away until tonight.

Still runs good, code came on just after startup...

Doing wireset and plugs tomorrow,
egr valve is next.

Anyone got hints / suggestions on how to clean the egr?

...
2002 Silver SL2, manual, 5th gear swap (.605), 78,000 miles, black badges,
205/60R15 "H" rated tires, 5mm spacers rear...
Pennzoil Ultra Platinum 5W-30, NAPA 41516...
NGK BKR6E-11 spark plugs

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Old 11-12-2016, 08:22 AM   #2
Cheyne
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Posts: 1,221

2000 SL2
Default Re: P0301 code...

See the richpin video:
https://www.youtube.com/watch?v=bt5lRTt6BsU

Why those spark plugs?

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Old 11-12-2016, 08:30 AM   #3
OldNuc
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Join Date: Apr 2008
Location: Far Southwestern Iowa
Posts: 63,236
 

1998 SC2
Default Re: P0301 code...

EGR is not likely to cause a 301. Plugs and wires is a better bet.

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Old 11-13-2016, 01:20 AM   #4
Saturn Night
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Join Date: Aug 2016
Location: Leavittsburg, OH
Posts: 1,967

1995 SC2
Default Re: P0301 code...

Are you getting a high idle, around 1,200-1,300rpms when the engine is warm?

...
1991 Pontiac Grand Am @ 139k - More rust than paint & no leaks
1995 Saturn SC2 @ 179k - 17.2538 @ 77.91mph w/Stock TB
Mechanic: I can't fix stupid, but I can fix what stupid does.

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Old 11-13-2016, 05:02 PM   #5
Jim@HiTek
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Location: Oregon
Posts: 159
 

2001 SL1
Default Re: P0301 code...

I just had the P0301 code. It was persistent. Symptoms were mild, but I had 1200 RPM while stopped at a stop light, engine warm.

Checked the plugs...fine. Checked the plug wires...fine.

Replaced the OEM inferior spark coils...no change.

Replaced the ICM...no change.

Sprayed carb cleaner near the cyl #1 intake area...Bingo! RPM dropped a little. So, bad intake manifold gasket.

Replaced it yesterday and the SES light was out shortly after starting and the idle is normal between 750 and 950 RPM. (Took my brother and me 5 hours! But we were also watching a Ducks game and taking our time).

So at least test that intake manifold gasket with spray cleaner first before you buy a bunch of stuff...unless those items need replacing anyway of course.

...
2001 Saturn SL1 SOHC
1.9L, Basic Transport

Last edited by Jim@HiTek; 11-13-2016 at 05:07 PM..

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