DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

Go Back   DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum > Dodge Ram Forum - Help Zone - Dodge Ram Problems, Complaints, & Solutions - Maintenance & Re > 3RD Generation Dodge Ram 2002 to 2008 Dodge Ram Trucks > Powertrain > 5.7L V8 Specific Topics


Notices


Latest Vendor News
AutoAnything
Addictive Desert Designs!
Bayou Goat Mounts

Reply
 
Thread Tools
  #1  
Old 03-11-2011, 10:58 AM
ocgamer ocgamer is offline
Dodge Ram Forum Junior Member
 
Join Date: Mar 2011
Location: central pennsylvania USA
Age: 47
Posts: 33
Gender: Male
Vehicle: 2004 Dodge RAM 1500 5.7 Hemi
Color: silver
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:10
ocgamer is on a distinguished road
Default Need help with check engine light and O2 sensor

Error is oxygen sensor bank 1 and 2 sensor 2 low voltage. His reader didnt have the ability to go any further in diagnostics but this fits with when the problem came after I installed my flowmaster exhaust im sure the techs damaged the sensor. Advance charges from $50-$100 per sensor (2 needed I guess) so im looking for some help making sure the sensor(s) need replacing.
Reply With Quote
Sponsored links
  #2  
Old 03-11-2011, 11:02 AM
BigHornRam2006's Avatar
BigHornRam2006 BigHornRam2006 is offline
Dodge Ram Forum Senior Member!
 
Join Date: Feb 2011
Location: Stewartsville, VA
Age: 28
Posts: 81
Gender: Male
Vehicle: 2006 Dodge Ram 1500
Trim Level: SLT Big Horn Edition
Color: Patriot Blue Metallic
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:10
BigHornRam2006 is on a distinguished road
Default

Quote:
Originally Posted by ocgamer View Post
Error is oxygen sensor bank 1 and 2 sensor 2 low voltage. His reader didnt have the ability to go any further in diagnostics but this fits with when the problem came after I installed my flowmaster exhaust im sure the techs damaged the sensor. Advance charges from $50-$100 per sensor (2 needed I guess) so im looking for some help making sure the sensor(s) need replacing.
If you don't mind me asking, who's reader didn't have the ability to go any further with diagnostics?
__________________
Dan R.
SGT, US Army
2006 SLT Big Horn
Reply With Quote
  #3  
Old 03-11-2011, 11:32 AM
RamTech's Avatar
RamTech RamTech is offline
Dodge Ram Forum Senior Member!

 
Join Date: Nov 2009
Location: Johnson City, TN
Age: 43
Posts: 12,120
Gender: Male
Vehicle: 2004 Dakota Club Cab 4X4
Trim Level: SXT
Color: Bright Silver
Engine: 2002-2008 226ci (3.7L) Magnum/PowerTech V6 215hp 235lb/ft
Rep Power: 14
Rep:1824
RamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant future
Default

What are the actual P codes?
Reply With Quote
  #4  
Old 03-14-2011, 01:26 PM
ocgamer ocgamer is offline
Dodge Ram Forum Junior Member
 
Join Date: Mar 2011
Location: central pennsylvania USA
Age: 47
Posts: 33
Gender: Male
Vehicle: 2004 Dodge RAM 1500 5.7 Hemi
Color: silver
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:10
ocgamer is on a distinguished road
Default

Well the codes I didnt see only the description of what the problem was. I guess I could try another shop to see if they could give me more information. I bought a manual of ebay but strangly this manual doesnt include the 5.7 liter engine only the 3.7L and 5.9L so I think it a manual from 03 or earlier. Does the 5.9L have the same basic layout? Looking at the 5.9L there is two O2 sensors one before the cat and one after. Reading the manual low voltage is zero volts or im guessing if the sensor wasnt installed would be the same reading as zero volts or no voltage would be reported if the sensor was missing or broken. Seems like the O2 sensor really effects MPG in the fuel to oxygen mixture ratios. Has anyone removed one of these sensors before? In the manual it calls for a special tool to grip all around the sensor and remove it. Does the sensor completely sit inside the exhaust pipe? Or can normal tools remove it?
Reply With Quote
  #5  
Old 03-14-2011, 01:46 PM
RamTech's Avatar
RamTech RamTech is offline
Dodge Ram Forum Senior Member!

 
Join Date: Nov 2009
Location: Johnson City, TN
Age: 43
Posts: 12,120
Gender: Male
Vehicle: 2004 Dakota Club Cab 4X4
Trim Level: SXT
Color: Bright Silver
Engine: 2002-2008 226ci (3.7L) Magnum/PowerTech V6 215hp 235lb/ft
Rep Power: 14
Rep:1824
RamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant future
Default

The 5.9 info and diag charts are pretty much useless for the 5.7. The Hemi uses four O2 sensors where the Magnum engines used two. O2 sensors have a HUGE impact on fuel economy and driveability. If a sensor was missing, you would actually see high voltage. Low voltage as see by the PCM indicates a possible short circuit.
Reply With Quote
  #6  
Old 03-15-2011, 02:14 PM
ocgamer ocgamer is offline
Dodge Ram Forum Junior Member
 
Join Date: Mar 2011
Location: central pennsylvania USA
Age: 47
Posts: 33
Gender: Male
Vehicle: 2004 Dodge RAM 1500 5.7 Hemi
Color: silver
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:10
ocgamer is on a distinguished road
Default

In a short circuit are you talking a defective sensor because the service manual states that 0 voltage would be low voltage. If the sensor was broken or missing wouldnt that be 0 (zero) voltage and force the result low voltage? 0v=low 5+v=high?
Reply With Quote
  #7  
Old 03-16-2011, 02:45 AM
chefred112's Avatar
chefred112 chefred112 is offline
Dodge Ram Forum Senior Member!
 
Join Date: Feb 2009
Location: NorCal
Posts: 5,731
Gender: Male
Vehicle: 2005 Dodge Ram
Trim Level: SLT
Color: white
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 9
Rep:647
chefred112 is a name known to allchefred112 is a name known to allchefred112 is a name known to allchefred112 is a name known to allchefred112 is a name known to allchefred112 is a name known to all
Default

whenever I've gotten circuit issues with the rear O2's, I clear the codes and see if they come back, if and when they do, I replace them and error goes away..no need to check anything else (at least in my experience with my truck)
__________________
-fast freddie-
one quick 05 hemi qc...with over 250k miles on odo... on the 5.7...stoker 6.4 now, new times coming
performance mods: yes 1/8 - 7.85 @ 93.20, 1/4 - 12.10 @ 113.96
2005 Dodge Ram 1500 QC SLT: 12.107 @ 113.960 MPH
Reply With Quote
  #8  
Old 03-16-2011, 08:02 AM
RamTech's Avatar
RamTech RamTech is offline
Dodge Ram Forum Senior Member!

 
Join Date: Nov 2009
Location: Johnson City, TN
Age: 43
Posts: 12,120
Gender: Male
Vehicle: 2004 Dakota Club Cab 4X4
Trim Level: SXT
Color: Bright Silver
Engine: 2002-2008 226ci (3.7L) Magnum/PowerTech V6 215hp 235lb/ft
Rep Power: 14
Rep:1824
RamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant futureRamTech has a brilliant future
Default

Quote:
Originally Posted by ocgamer View Post
In a short circuit are you talking a defective sensor because the service manual states that 0 voltage would be low voltage. If the sensor was broken or missing wouldnt that be 0 (zero) voltage and force the result low voltage? 0v=low 5+v=high?
No, it wouldn't.
Reply With Quote
  #9  
Old 03-16-2011, 06:27 PM
Kruzer Kruzer is offline
Dodge Ram Forum Junior Member
 
Join Date: Feb 2011
Location: Fort Smith, AR
Age: 50
Posts: 44
Gender: Male
Vehicle: 2007 Ram 1500
Trim Level: SLT
Color: Inferno Red
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:36
Kruzer is on a distinguished road
Default

Anytime you have an open circuit you will read source voltage, whatever that is, 5vdc, 12vdc etc... So if the O2 sensor circuit is open the PCM will read a high voltage, and turn on the check engine light and set the matching DTC. If the circuit is shorted to ground then you will get 0vdc or a low voltage. PCM does the same thing again and sets a DTC for circuit low. Hope that helps.
Reply With Quote
  #10  
Old 03-16-2011, 06:37 PM
98sst's Avatar
98sst 98sst is offline
Dodge Ram Forum Senior Member!

 
Join Date: Aug 2009
Location: Rainy, Washington
Posts: 3,410
Gender: Male
Vehicle: 1998 Dodge ram 1500
Trim Level: SS/T
Color: black w/ silver stripes
Engine: 1998-2001 360ci (5.9L) Magnum V8 245hp(standard), 250hp(Sport package)
Rep Power: 7
Rep:883
98sst is a splendid one to behold98sst is a splendid one to behold98sst is a splendid one to behold98sst is a splendid one to behold98sst is a splendid one to behold98sst is a splendid one to behold98sst is a splendid one to behold
Default

Quote:
Originally Posted by ocgamer View Post
Well the codes I didnt see only the description of what the problem was. I guess I could try another shop to see if they could give me more information. I bought a manual of ebay but strangly this manual doesnt include the 5.7 liter engine only the 3.7L and 5.9L so I think it a manual from 03 or earlier. Does the 5.9L have the same basic layout? Looking at the 5.9L there is two O2 sensors one before the cat and one after. Reading the manual low voltage is zero volts or im guessing if the sensor wasnt installed would be the same reading as zero volts or no voltage would be reported if the sensor was missing or broken. Seems like the O2 sensor really effects MPG in the fuel to oxygen mixture ratios. Has anyone removed one of these sensors before? In the manual it calls for a special tool to grip all around the sensor and remove it. Does the sensor completely sit inside the exhaust pipe? Or can normal tools remove it?
It can be easily removed with an open end wrench. I forget what size, I want to say 3/4 or 15/16 is what it was for a dakota i worked on a few weeks ago... not a hemi obviously.

Just make sure when you replace it, if you need to, pre twist the wire counter clockwise so that when youre threading the sensor in it will untwist and be straight.
__________________

Alex, 1998 Ram 1500 SS/T. What the world needs is more geniuses with humility, there are so few of us left.
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Automatic Start Issue / Check Engine Light 07Ram 5.7L V8 Specific Topics 4 05-19-2011 06:46 PM
O2 sensor cause check engine light to come on pike16 Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 21 03-20-2011 02:06 PM
2003 ram tires & check engine light, air bag light on morera Electrical 4 12-27-2010 01:10 AM
check engine light MOPAR stallion 5.9L V8 Specific Topics 24 11-26-2010 03:12 AM
Check Engine light and Brand new Superchips not working dirtsurferus Custom Dodge Ram Performance Mods - Engine - 5.9 Liter V8 8 10-26-2009 04:20 PM


Advertisement






All times are GMT -4. The time now is 12:52 AM.


= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors


=Gigathreads Network=
CLUBS MOPAR NATION DSM GPMM MAMM JAM
DIESEL Diesel Forum      
CHEVY Chevy Camaro Forum Chevy Volt Forum    
CHRYSLER Chrysler 300C Forum      
DODGE Dodge Avenger Forum Dodge Caliber Forum Dodge Challenger Forum Dodge Charger Forum
  Dodge Circuit Forum Dodge Hornet Forum Dodge Magnum Forum Dodge Nitro Forum
  Dodge Ram Forum Dodge Dakota Forum Dodge Durango Forum Dodge Dart Forum
FORD Ford Raptor Forum Ford F150 Forum Ford F100 Forum  
JEEP Jeep Forum      
PONTIAC Pontiac G8 Forum      
SRT SRT Viper Forum SRT Cuda Forum