Service Engine Soon - No Codes
Thread Starter
Pro
Joined: May 2003
Posts: 503
Likes: 16
From: Virginia Beach VA
Service Engine Soon - (Update) - P1416
1996 LT1 Coupe Automatic
The SES light came on (solid) about 2 miles from the house. Car started and runs fine. Drove to the gas station for I was down to 4 gallons in the tank. Filled up. SES stayed on. I pulled the codes using a paperclip (12/4) and got C12....'---',...1. '---', 9. '---', A. '---', and 1.0
Doesn't look like any error codes are present.
Owner’s manual mentions things like changing fuel grades (been using Shell 93 for the past couple of months), low fuel level pulling in air, etc.
Any ideas?
I guess is the SES will stay lit until the symptoms go away..?
The SES light came on (solid) about 2 miles from the house. Car started and runs fine. Drove to the gas station for I was down to 4 gallons in the tank. Filled up. SES stayed on. I pulled the codes using a paperclip (12/4) and got C12....'---',...1. '---', 9. '---', A. '---', and 1.0
Doesn't look like any error codes are present.
Owner’s manual mentions things like changing fuel grades (been using Shell 93 for the past couple of months), low fuel level pulling in air, etc.
Any ideas?
I guess is the SES will stay lit until the symptoms go away..?
Last edited by VA50th; Nov 12, 2010 at 04:56 PM.
Le Mans Master
Joined: Mar 2001
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
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St. Jude Donor '12
Since the 96 is odb2 you should be able to go by any auto parts store and have them pull codes for you
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
reset the light, see if it comes back, a voltage spike , up or down will sometimes turn it on, most times a service light with no codes is a mileage marker for oil change
Last edited by oldalaskaman; Nov 12, 2010 at 09:24 AM. Reason: more info
Racer
Joined: Apr 2006
Posts: 327
Likes: 0
From: edgerton WI
Clean the check valve on the tube that comes up from the pasenger side exhust manafold. Do both sides clear codes and see if this works. It only costs $3.00 and about an hour. I use tb cleaner or carb cleaner. Good luck.
Melting Slicks
Joined: Jul 2008
Posts: 2,267
Likes: 142
From: Ottawa Ontario
I had to do this on my LT4. I sprayed some TB cleaner into the hose and blew it through the valve with my mouth. If you have access to an air compressor, it would be a lot easier, I'm sure. Make sure you get TB cleaner that's safe for O2s and cat. converters. 
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