New code:
P0171 Fuel Trim System Lean Bank 1
Wish I had my AFR gauge installed!
Oh well, I'm sure the AEM F/IC and 650cc injectors will fix that!
But I wonder how lean your system has to be to throw THAT code?

 

I just got the same code p0171. The damn o2 senser. You guys know any way to fix this I already have the defoulers set up on the s pipe and dont want to have to buy a new o2 senser. Is there anyway to test / fix it?

 

P0171 Pobable causes:

1) If bank one and two codes set together suspect fuel pressure or MAF sensor.

2) oxygen sensor defective.

3)ignition misfire-repair.

4)Fuel injector problem.

 

Are you boosted? Turbo or SC? What size injectors?
If so, a good tune on a piggy back should fix that. You just need more fuel.

 

Nope just have a cai and dc header.