PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

anyone know this code?

Old Feb 17, 2005 | 02:28 PM
  #1  
koniu77's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2004
Posts: 98
Likes: 0
Default anyone know this code?

my ses light poped today, after checking it with my predator it says P0171 Fuel Trim Bank1, System too lean. Anyone know what might cause this?
Reply
Old Feb 17, 2005 | 02:33 PM
  #2  
horist's Avatar
TECH Senior Member
 
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
Default

Exhaust leak near collector or at heads, clogged injector, lazy O2 sensor

Did this just start or have you done any mods lately?

Bank 1 is Driver side, so it's gotta be something that the two sides don't have in common

I would check for an exhaust leak, you can swap O2 sensors to see if the problem follows the sensor... if it stays on that side then either extra unmetered air is only entering that side or an injector isn't providing enough fuel
Reply
Old Feb 17, 2005 | 02:43 PM
  #3  
koniu77's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2004
Posts: 98
Likes: 0
Default

Originally Posted by horist
Exhaust leak near collector or at heads, clogged injector, lazy O2 sensor

Did this just start or have you done any mods lately?

Bank 1 is Driver side, so it's gotta be something that the two sides don't have in common

I would check for an exhaust leak, you can swap O2 sensors to see if the problem follows the sensor... if it stays on that side then either extra unmetered air is only entering that side or an injector isn't providing enough fuel
this just happened today. might be a leak, just did my exhaust couple days ago, and i can hear that i have leak somewhere. Thx for the info.
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 02:00 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE