Oxygen sensor help - Ranger-Forums - The Ultimate Ford Ranger Resource


General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-21-2010
newschoolpickup's Avatar
Member
Thread Starter
 
Join Date: Apr 2009
Location: Astoria, OR
Posts: 17
Oxygen sensor help

I recently took my truck(97' ranger) to a hardware parts store and had a friend there run his diognostic code reader. it came up with this P0171- which means that there is to much air in (bank 1) and i also got P0174(bank 2) which is basically the oposite side with the same problem. I have just did a small amount of searching and some people are saying they clean the MAF sensor. does that work? and when it says bank 1 and 2 what sensor is it talking about. Thanks matt
Reply With Quote
  #2  
Old 06-21-2010
Blhde's Avatar
Member
 
Join Date: Oct 2005
Location: Northern IL
Posts: 2,804
Cleaning the maf is 5-7 bucks and 10 minutes of time. O2's are nearly 75 a piece for oems. They will take about 15 minutes a side to change IF they are not stuck in.

If your over 100k you need to both. Plugs and wires cant hurt either.
Reply With Quote
  #3  
Old 06-22-2010
newschoolpickup's Avatar
Member
Thread Starter
 
Join Date: Apr 2009
Location: Astoria, OR
Posts: 17
ya it has 130k+some change. the wires do you mean the whole thing or just to the plug part
Reply With Quote
  #4  
Old 06-22-2010
cheese_man's Avatar
Member
iTrader: (1)
 
Join Date: Nov 2009
Location: arthur
Posts: 2,100
new spark plug wires and spark plugs
Reply With Quote
  #5  
Old 06-22-2010
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,831
Quote:
Originally Posted by newschoolpickup View Post
I recently took my truck(97' ranger) to a hardware parts store and had a friend there run his diognostic code reader. it came up with this P0171- which means that there is to much air in (bank 1) and i also got P0174(bank 2) which is basically the oposite side with the same problem. I have just did a small amount of searching and some people are saying they clean the MAF sensor. does that work? and when it says bank 1 and 2 what sensor is it talking about. Thanks matt
Bank 1 = passenger side
Bank 2 = driver side

The two O2 sensors that are being read for these codes are the ones closest to the engine on each of the two banks.

Here are a few general possibilties for lean codes P0171/P0174. I'd rank them like this with most likely at the top of the list and least likely at the bottom:
  • Vacuum leak
  • Leak between MAF sensor and throttle body
  • Dirty MAF sensor
  • Dirty injectors
  • Low fuel pressure.
  • Bad oxygen sensors

These codes are not caused by an ignition problem. At high miles, it may well be time to replace the plugs/wires but that is a separate issue.

BTW, please remember to include the year/model/engine/transmission/mods/etc. when asking any technical questions. Sometimes there are known problems that are specific to a particular combination.
Reply With Quote
  #6  
Old 06-22-2010
newschoolpickup's Avatar
Member
Thread Starter
 
Join Date: Apr 2009
Location: Astoria, OR
Posts: 17
Oops?!? 1997 ranger 4.0 5 speed 4x4. thanks for the help
Reply With Quote
  #7  
Old 06-23-2010
newschoolpickup's Avatar
Member
Thread Starter
 
Join Date: Apr 2009
Location: Astoria, OR
Posts: 17
how do you check to see if there is a vacuum leak and between MAF and throttle body?
Reply With Quote
  #8  
Old 06-23-2010
evilclown312's Avatar
Member
iTrader: (3)
 
Join Date: Dec 2008
Location: Logan ohio
Posts: 2,772
Easiest way i know is to spray the hoses with brake clean if the engine starts to die the you have a vacum leak where your spraying.
Reply With Quote
  #9  
Old 06-23-2010
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by rwenzing View Post
Bank 1 = passenger side
Bank 2 = driver side

The two O2 sensors that are being read for these codes are the ones closest to the engine on each of the two banks.

Here are a few general possibilties for lean codes P0171/P0174. I'd rank them like this with most likely at the top of the list and least likely at the bottom:
  • Vacuum leak
  • Leak between MAF sensor and throttle body
  • Dirty MAF sensor
  • Dirty injectors
  • Low fuel pressure.
  • Bad oxygen sensors

These codes are not caused by an ignition problem. At high miles, it may well be time to replace the plugs/wires but that is a separate issue.

BTW, please remember to include the year/model/engine/transmission/mods/etc. when asking any technical questions. Sometimes there are known problems that are specific to a particular combination.
Also, you can view the fuel trims under loaded/nonloaded areas of the map to view where your system is dumping extra fuel to compensate for the lean-ness that the hegos are measuring. Vacuum leaks are prevalent under low load due to the fact that the throttle plate is a vacuum leak itself, when you open the throttle it hides the effect of small vacuum leaks. I have a great post on these codes but the mods never stickied it (you should search)
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Oxygen Sensor Question THEDUSTCLOUD SOHC - 2.3L & 2.5L Lima Engines 3 03-09-2011 01:12 AM
Oxygen Sensor - Where is bank one upstream located? Spacetrucker General Ford Ranger Discussion 5 10-27-2010 03:29 PM
For Sale: Motorcraft Oxygen Sensor DY-835 (GA) USMCWHITENER Interior, Exterior, Electrical, & Misc. 0 02-17-2010 08:57 PM
Drivers Side Upstream Oxygen Sensor rk9251 2.9L & 3.0L V6 Tech 3 05-29-2009 07:50 PM
oxygen sensor rwillmarth 4.0L OHV & SOHC V6 Tech 4 11-11-2008 03:13 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 08:08 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.