Check engine light on, know the trouble codes... - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-22-2007
ThatGuy's Avatar
Member
Thread Starter
iTrader: (1)
 
Join Date: Jun 2004
Location: Kent, Ohio
Posts: 325
Check engine light on, know the trouble codes...

Ok... so out of no where today, my check engine light came on. I swung into autozone and they pulled the codes for me....

P0174 (Fuel system for bank 2 too lean)

P0171 (Fuel system for bank 1 too lean)

They gave me a list of a few things it could be, but im thinking it might very well be the MAF (it was on the list). I have had problems getting it started sometimes, have to give it gas, or it takes a second to get itself running right. Also noticed carbon on my exhaust tips, nothing like a ring of black around the edge. Are my thoughts right? or could it be an 02 sensor or something easy. If its something easy to fix i'll do it myself, if its the MAF, i'll take it in, have ford fix it, and pay my 100 dollar warranty deductible.

-Brad
Reply With Quote
  #2  
Old 04-22-2007
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Here are a few common causes:

leak between the MAF and the throttle body;
leak in the PCV system, especially the hose elbow;
leaking intake manifold gaskets or any other vacuum leak.


Less likely but possible:

dirty MAF;
low fuel pump pressure/clogged fuel filter/dirty injectors;
"lazy" oxygen sensors (the front ones).
Reply With Quote
  #3  
Old 04-22-2007
Member
 
Join Date: Mar 2006
Location: Mesa, Arizona
Posts: 886
Ima guess PCV hose is kinked or has a hole in it. MAF can be cleaned with electronic cleaner or brake clean (the non chlorinated kind). I would also listen for vac leaks under the hood.
Reply With Quote
  #4  
Old 04-22-2007
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
Bob has it nailed down.

I did have a road trip in the lightning once. Got a CEL and I pulled the codes. Exact same.. lean on both banks. Turned out to be some lint/fuzz on the MAF wire. Cleaned it and I was fine.

Rich
Reply With Quote
  #5  
Old 04-28-2007
ThatGuy's Avatar
Member
Thread Starter
iTrader: (1)
 
Join Date: Jun 2004
Location: Kent, Ohio
Posts: 325
Im going to check the MAF either tomorrow or monday, its been running fine so i wasn't to worried about it (i work a lot... and go to college) i do have a problem at start up (it wants to die all the time if its been sitting for a while) im guessin thats the IAC valve, its been going on for a while now, month or so before the CEL came on. Thanks guys.

-Brad
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
engine trouble codes 2ranger General Technical & Electrical 2 05-02-2014 07:23 PM
Fix for Check Engine light codes: p0401, po171 and po174 TheBearJeweler General Ford Ranger Discussion 66 02-05-2013 09:54 AM
Check engine light came on: Codes P0054 and P0455 winks General Ford Ranger Discussion 27 06-25-2010 07:31 AM
check engine light /// evap code and 2 lean codes 4x4ranger 4.0L OHV & SOHC V6 Tech 0 02-16-2010 07:10 AM
Check Engine light, multiple codes...argh TippsTheFoo 4.0L OHV & SOHC V6 Tech 16 08-14-2007 09:49 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 06:07 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.