PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Couple of codes bothering me

Thread Tools
 
Search this Thread
 
Old Nov 25, 2009 | 02:55 PM
  #1  
user 648967286742's Avatar
Thread Starter
Banned
iTrader: (5)
 
Joined: Nov 2008
Posts: 281
Likes: 0
Default Couple of codes bothering me

Well, My car hasnt been running right since it was down for 2 months without a rear end. After i installed the rearend, it seemed slow, even for 4.10 gears. I didnt have any lights on my dash that showed that i had any codes. But i was curious. I went to scan it and found 11 codes. A few of them were no suprise like the EGR and skip shift. But some others popped up as well.

1. p0102 - MAF or VAFA curcuit low input
2. p0141 - o2 sensor heater Curcuit Malfunction Bank 1 sensor 2
3. p0155 - o2 sensor heater Curcuit Malfunction Bank 2 sensor 1
4. p0161 - o2 sensor heater Curcuit Malfunction Bank 2 sensor 2
5. didnt right down number but it was another o2 bank 1 sensor 1

Now I only have 2 o2 sensors. They are the ones on the my Long tube's. I dont have the others bc i have an ORY. Is it fine to run with just the front o2's or should i do something to get the rest? I can get these fixed no problem and i know if the o2's are bad that it would cause my car to run like **** so i figured that would be part of the problem for my car to be running so slow.

The real problem i am having is the first code. The MAF or VAFA code. I tried using 2 other mass air flow's but nothing changed. I even unplugged it while the car was running to see if it changed how it idle'd. Nothing changed. How do i fix this first code. I have no intake mods except for my lid and EGR delete. I even have a paper filter. Its not de-screened or anything. It's untouched. Is there something i am missing or what? What do i need to do to get my car running the way it should.

Any advice would be awesome!
Reply
Old Nov 25, 2009 | 04:33 PM
  #2  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

MAF is failed, it is running in speed density and most likely open loop. There is a fuse that supplies power to the MAF and to the O2 heaters. I would say it's a likely culprit. I forget the labeling of the fuse, but you don't have that many, so just look through them.
Reply
Old Nov 26, 2009 | 06:46 PM
  #3  
user 648967286742's Avatar
Thread Starter
Banned
iTrader: (5)
 
Joined: Nov 2008
Posts: 281
Likes: 0
Default

well, i checked all the the fuses i have. nothing has changed. Any idea what else could be causing the problems?
Reply
Old Nov 26, 2009 | 09:18 PM
  #4  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

you checked the fuses in the dash and under the hood? Unplug your MAF, turn your key to run (not start) and measure the 3 wires that feed the MAF with a DMM. One of them should be +12, but I bet it's not.
Reply
Old Nov 26, 2009 | 09:53 PM
  #5  
JonCR96Z's Avatar
TECH Junkie
20 Year Member
Photogenic
iTrader: (33)
 
Joined: Jan 2003
Posts: 3,006
Likes: 19
From: Asheboro, NC
Default

It's the 'ENG SEN' fuse under the hood. It sound like something is wrong with that circuit fuse or wires one.
Reply
Old Nov 27, 2009 | 08:22 AM
  #6  
Phil'sC5vette's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Feb 2004
Posts: 1,074
Likes: 0
From: Tampa
Default

Originally Posted by Frost
MAF is failed, it is running in speed density and most likely open loop. There is a fuse that supplies power to the MAF and to the O2 heaters. I would say it's a likely culprit. I forget the labeling of the fuse, but you don't have that many, so just look through them.
your codes 2-6 arent your problem.

Frost is right. The big red flag is your MAF.

If you disconnected the MAF recently, also check to see if one of your male end pins didnt bend when reconnecting.
Reply
Old Nov 29, 2009 | 08:06 PM
  #7  
user 648967286742's Avatar
Thread Starter
Banned
iTrader: (5)
 
Joined: Nov 2008
Posts: 281
Likes: 0
Default

Ill have to wait until tomorrow to check everything. I havent been on lately so i havent really had a chance to mess with the car either. Ill let you know what i find out tomrrow morning.
Reply
Old Nov 29, 2009 | 08:18 PM
  #8  
user 648967286742's Avatar
Thread Starter
Banned
iTrader: (5)
 
Joined: Nov 2008
Posts: 281
Likes: 0
Default

Originally Posted by JonCR96Z
It's the 'ENG SEN' fuse under the hood. It sound like something is wrong with that circuit fuse or wires one.
I just replaced that fuse bc it blew out. It fixed my reverse lockout but thats it.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Nov 30, 2009 | 12:35 AM
  #9  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

No trust me, it does a lot more than that...
Reply
Old Dec 6, 2009 | 04:42 PM
  #10  
user 648967286742's Avatar
Thread Starter
Banned
iTrader: (5)
 
Joined: Nov 2008
Posts: 281
Likes: 0
Default

Just an update...i havent been able to find the problem..im just gonna take it to a tuner and have them trace it down i guess. All fuses are good and all wires APPEAR good. Still throwing the codes though.
Reply




All times are GMT -5. The time now is 04:00 AM.

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