Not you average p0174 question
Thread Starter
Pro
Joined: Sep 2012
Posts: 651
Likes: 3
From: Gambrills MD
Not you average p0174 question
Hey guys so heres the deal..... I had a fellow forum member swap my headers. I had dough thorley and switched to lg LT headers. car has a volant CAI. car was tuned by a local shop when it had the thorley headers on it. after the header swap i am getting the p0174 code by itself. Not with the p0171. so pulled the whole intake off re attached all is well. cleaned the maf no change. no intake vacuum leaks anywhere that i can find. checked the manifold, the tubes coming off the manifold injector seals. So lets here some brain storming of what it could be or how i can further diagnose the problem.
Drifting
Joined: Feb 2012
Posts: 1,796
Likes: 37
From: skiatook oklahoma
i had this saved. if its useful great, if not sorry i cant help more..
(step 4 is interesting question)
http://www.ls2.com/boggs/dtcs/DTC%20P0174.htm
and this one... http://www.obd-codes.com/p0174
(step 4 is interesting question)
http://www.ls2.com/boggs/dtcs/DTC%20P0174.htm
and this one... http://www.obd-codes.com/p0174
Last edited by ChevyDave; Mar 28, 2013 at 01:42 PM.
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Check for:
Bank 2 exhaust leaks, missing or loose exhaust hardware.
Bank 2 HO2S #1 is installed securely and electrical connector not contacting exhaust system or ignition wires.
Engine mechanical failure. Refer to Base Engine Misfire Diagnosis in Engine Mechanical 5.7L.
Vacuum leaks that will only affect bank 2 such as the intake manifold, the injector O rings, etc.
Bank 2 exhaust leaks, missing or loose exhaust hardware.
Bank 2 HO2S #1 is installed securely and electrical connector not contacting exhaust system or ignition wires.
Engine mechanical failure. Refer to Base Engine Misfire Diagnosis in Engine Mechanical 5.7L.
Vacuum leaks that will only affect bank 2 such as the intake manifold, the injector O rings, etc.
Thread Starter
Pro
Joined: Sep 2012
Posts: 651
Likes: 3
From: Gambrills MD
ok going to take a look at where the header bolts head for leaks. might swap gaskets. if the 02 sensor wires were burned through i would think that the light would light up even while driving not just at idle. checked those areas for vacuum leaks. and it kinda makes sense since the headers were just swapped
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Pro
Joined: Sep 2012
Posts: 651
Likes: 3
From: Gambrills MD
alright guys as of right now i have the feeling it was the wrong header gasket. totally my fault as the guy on the forum that installed them used what i provided. but i could tell just by looking at the gasket that it was leaking right there. Put the old gaskets back on and light hasn't returned. i'll put some more miles on it just to make sure
Drifting
Joined: Feb 2012
Posts: 1,796
Likes: 37
From: skiatook oklahoma
boggs scores another 2 points. must be up to about 980 points by now.. (if you get 1000 you get a gold star)
btw.. as they used to tell me in the office (before i retired) , 1 oh-s**t wipes the board clean and you have to start your points all over. i never made it past 12 points!!!! lol
btw.. as they used to tell me in the office (before i retired) , 1 oh-s**t wipes the board clean and you have to start your points all over. i never made it past 12 points!!!! lol
Last edited by ChevyDave; Mar 28, 2013 at 03:35 PM.