p0131, p0137, p0151, p0157

**NE98LS1** · 06-23-2009, 03:03 PM

So when i get on my car real hard it will pop the SES light on for a couple hours then go away. So i finally went and pulled the codes today and this is what I got, they are all the 02 sensor bank 1 sensor 1 bank 2 sensor 1, low voltage. do i need to replace my o2s or what am i looking at?

**NE98LS1** · 06-23-2009, 03:11 PM

so i just found this thread

http://www.ls1.com/forums/showthread.php?t=83557

and it sounds like a very similar circumstance. should i just go ahead and pick a fuel pressure regulator up and try this, or would replacing the o2s be the first step?

**shady milkman** · 06-23-2009, 06:03 PM

do you have longtubes ?

**Too Fast** · 06-23-2009, 06:38 PM

I'd check the fuel pressure first, before anything else. Especially if it is somewhat sluggish.

**NE98LS1** · 06-23-2009, 08:44 PM

no i don't have long tubes, just a K&N and flowmasters, basically stock

**shady milkman** · 06-24-2009, 05:04 AM

Originally Posted by Too Fast

I'd check the fuel pressure first, before anything else. Especially if it is somewhat sluggish.

i was thinking lazy 02s if he was running longtubes..since its very common with longtubes...that or a leak somewhere ..but FP is a good first diagnostic

**Too Fast** · 06-25-2009, 03:04 PM

^^^ yeah that does make some sense. It always makes me wonder why I've never had any problems since I installed my LTs except the SES light is always on. I must be one of the lucky ones, Too Fast runs great and MPG is up.

**shady milkman** · 06-26-2009, 05:06 AM

Originally Posted by Too Fast

^^^ yeah that does make some sense. It always makes me wonder why I've never had any problems since I installed my LTs except the SES light is always on. I must be one of the lucky ones, Too Fast runs great and MPG is up.

i have a lazy o2 right now after my header install...it might be related to a possible exhaust leak tho (QTP headers)

**NE98LS1** · 06-26-2009, 05:36 PM

pretty sure got it figured out. the MAF was dirty and there was something wrong with the ECU program that wasn't giving it enough fuel at WOT causing it to run lean. car is running better than it ever has and no SES!!!

**shady milkman** · 06-26-2009, 07:03 PM

Originally Posted by NE98LS1

pretty sure got it figured out. the MAF was dirty and there was something wrong with the ECU program that wasn't giving it enough fuel at WOT causing it to run lean. car is running better than it ever has and no SES!!!

congrads