What causes P0171/P0174 Lean Bank 1/2? - DodgeForum.com

Go Back  DodgeForum.com > Dodge Trucks > Dodge Ram > 3rd Gen Ram Tech
Reload this Page > What causes P0171/P0174 Lean Bank 1/2?
Notices
3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

What causes P0171/P0174 Lean Bank 1/2?

Reply

 
 
  #1  
Old 11-12-2008, 08:16 PM
Hawke
Hawke is offline
Registered User
Thread Starter
Join Date: Nov 2008
Posts: 1
Default What causes P0171/P0174 Lean Bank 1/2?

I ran this code at Advanced the other day. Does anyone know what could cause this? The only indications I have of a problem from the truck, besides the codes, is the idle fluctuating +/-200 RPM on start up and sometimes dying at idle when engine is still cold. The check engine light goes out every once in a while but is on most of the time.
 
Reply With Quote
  #2  
Old 11-12-2008, 10:50 PM
lxman1's Avatar
lxman1
lxman1 is offline
Site Moderator
Dodge Forum Moderator
Join Date: May 2008
Location: Louisville, Ky
Posts: 9,399
Default

A vacuum leak, clogged fuel filter or weak fuel pump.
 
Reply With Quote
  #3  
Old 11-21-2008, 10:00 PM
DodgeAdvisor
DodgeAdvisor is offline
Registered User
Join Date: Nov 2008
Posts: 14
Default

If the PCM multiplies short term compensation by long term adaptive and a certain percentage is exceeded for two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored. Two Trip Fault. Three good trips to turn off the MIL
 
Reply With Quote
  #4  
Old 11-21-2008, 10:36 PM
dhvaughan's Avatar
dhvaughan
dhvaughan is offline
Hall Of Fame
Join Date: Jul 2006
Location: Gainesville, Ga.
Posts: 12,203
Default

on my ford explorer it was an intake leak.
 
Reply With Quote
  #5  
Old 11-21-2008, 11:24 PM
lxman1's Avatar
lxman1
lxman1 is offline
Site Moderator
Dodge Forum Moderator
Join Date: May 2008
Location: Louisville, Ky
Posts: 9,399
Default

Real common codes with a MAF system and a vacuum leak.
I can't believe that Dodge still uses the outdated map sensor system. These trucks would gain more from CAI's, exhaust mods, cams and heads if they had a MAF to measure the extra airflow.
 
Reply With Quote
  #6  
Old 08-16-2009, 12:28 PM
karl918
karl918 is offline
Registered User
Join Date: Aug 2009
Posts: 7
Default 1996 neon p0171

I keep getting a p0171 code (lean bank 1) on my 96 Neon. I've changed the air filter and the O2 sensor and I've checked for vacuum leaks, but the CEL keeps coming back on, giving me the same code. What else could it be?

Karl918
 
Reply With Quote
  #7  
Old 06-04-2014, 03:41 PM
decapitateobama80
decapitateobama80 is offline
Registered User
Join Date: Jun 2014
Posts: 1
Default Help

Can someone pls tell me what is going on . i have a 97 Intrepid . codes r PO171 and PO174 . i put fuel filter , spark plugs , , was running good but hard time starting
 
Reply With Quote
  #8  
Old 06-05-2014, 09:52 AM
readyakira
readyakira is offline
Registered User
Join Date: Dec 2012
Posts: 24
Default

If you don't visually seem a vacuum leak you can try spraying some carb cleaner around the top of the engine and listen for changes in rpm. Of course if ya have a scanner you can watch the short term fuel trims for changes when doing this. Lean Codes are usually an air leak in the intake portion of the engine. Rich codes are usually misfiring spark plugs or stuck injectors.
 
Reply With Quote
  #9  
Old 06-05-2014, 09:53 AM
readyakira
readyakira is offline
Registered User
Join Date: Dec 2012
Posts: 24
Default

oh. Idle air could cause a lean code too... But, I am not sure if your engine has one.
 
Reply With Quote
 
 
 

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ggreekggod
Dodge Stratus
15
10-14-2015 11:25 AM
midnightdweller1
Dodge Stratus
2
10-11-2015 07:24 PM
Durangonut
Dodge Journey
0
09-19-2015 04:31 PM
midnightdweller1
Dodge Stratus
4
09-16-2015 08:55 PM
jamesnb
2nd Gen Ram Tech
2
09-01-2015 12:42 AM


Thread Tools
Search this Thread
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Featured Sponsors

All times are GMT -4. The time now is 10:46 AM.