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01-03-2010, 04:54 PM #1
Bank 1 to lean, trouble code, help
The check engine light came on this morning.
Bank 1 is running lean. I'm thinking a vacuum issue, or perhaps an O2 sensor. But which O2 sensor?
Truck had a rough idle this morning on start up. Once warm it was fine. Lighht came on after a short trip to the store.
Has anyone had the same issue/code? What solved it for you? I have new plugs and Sea Foam waiting for a warm day to do, provided I can solve the check engine light issue. I have disconnected the battery to see if the code comes back.
Thanks for any help.
Last edited by itsabowtime2; 01-03-2010 at 07:56 PM.2003 Chevy Tahoe Z71 4x4
2000 F250 Super Duty Crew Cab 4x4
2005 Dodge Grand Caravan
3055 Bayliner Ciera (2x SBC)
Sea Doo GTX Limited
Sea Doo XP (currently rebuilding the engine)
Life is short. Boats and trucks are cool.
01-03-2010, 07:19 PM #2
- Join Date
- Jun 2009
I just had the same problem recently but it was bank 1 and bank 2 were lean. The truck would start up and rev to about 2k rpms then it would drop down to a rough 4-500 rpm. It only did it when it was cold outside, I chased down a few little things but it ended up being the intake gaskets. The gaskets were $40 and about 1.5 hours of my time, didnt even have to drain the coolant. My truck has 136k on it02 silverado
4/6" djm kit
one part, one paycheck, one week at a time
01-03-2010, 07:29 PM #3
01-03-2010, 07:57 PM #4
Had a ran at a parts store. The counter sales person said it was "Bank 1 is running lean"
01-03-2010, 08:51 PM #5
01-03-2010, 11:00 PM #6
use some carb cleaner to find the leak while its running
99 tahoe 2 dr. 4x4 7.4 4L80-e NP246, SAS, dana 60 hp, sterling 10.5 rear, gibson headers, and alot of tricks of the trade !!!!!!IF YOU'RE NOT CHEATING YOUR NOT TRYING!!!!!!!!
01-04-2010, 06:18 AM #7
01-04-2010, 08:25 AM #8
my truck is goin in on wed. i'll let you know what happens!!
01-04-2010, 08:30 AM #9
01-04-2010, 10:42 AM #10
- Join Date
- Nov 2009
Anyone find out what the code was? I have the same thing lolJoser
2001 Silverado 5.3L
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