New Alt = Check engine light!?! - 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 08-26-2006
TheForce02's Avatar
Member
Thread Starter
 
Join Date: Jun 2004
Location: Chino, CA
Posts: 846
New Alt = Check engine light!?!

So I installed my new 170amp alternator today. Now I have a check engine light that won't go away. I will be leaving in a little bit to go to auto zone and see if they can tell me what is up, does anybody have any ideas?

Also is there any way that I can check to make sure that my alternator is working like it is supposed to? thanks
Reply With Quote
  #2  
Old 08-26-2006
r0ng5's Avatar
Member
iTrader: (1)
 
Join Date: Jun 2004
Location: LA, CA
Posts: 2,575
don't know, but your dash is always putting up lights

BUMP!
Reply With Quote
  #3  
Old 08-26-2006
zabeard's Avatar
who?
iTrader: (8)
 
Join Date: Nov 2004
Location: IN
Posts: 26,045
Check Engine? Or Check Guage? IF the alternator wasnt working right, the battery guage would be really low.
Reply With Quote
  #4  
Old 08-26-2006
Audiojunkie's Avatar
Member
 
Join Date: Aug 2006
Location: Brunswick Maine
Posts: 45
Double check all connections..you may have forgotten the connector that tells the ECU the alterntor is working.
Reply With Quote
  #5  
Old 08-26-2006
graniteguy's Avatar
Member
iTrader: (3)
 
Join Date: Jul 2005
Location: Texas
Posts: 3,221
If you have a voltmeter- measure the volts from the battery with the engine off and again with the engine running. It should be higher with the engine running. Probably around 12 engine off and 14 with engine running.
Reply With Quote
  #6  
Old 08-27-2006
TheForce02's Avatar
Member
Thread Starter
 
Join Date: Jun 2004
Location: Chino, CA
Posts: 846
Ok so I went to auto zone and ran the code.

It turned out to be a P0113-IAT Sensor 1 Circuit High Input. I cleared the code and all has been good since. I asked the guy at auto zone about the IAT sensor and why it would have went off. He said that more then likely it was a "hick-up" signal since the code cleared and since what I did should have had nothing to do with the new alternator. I am glad about this!

graniteguy- i don't have a voltmeter, but I am going to try and find somebody with one and check to make sure everything is working good. I turned my truck on and off a ton of times since I put it on and no issues, so I figure it is working good.
Reply With Quote
  #7  
Old 08-27-2006
04 EDGE
Unregistered User
 
Posts: n/a
you probley un-pluged it and forgot to plug it back in and turned the key on.
Reply With Quote
  #8  
Old 08-27-2006
RangerEdgeO2's Avatar
Member
 
Join Date: May 2005
Location: Florida
Posts: 247
That's weird. The IAT is part of the MAFS. Only way to have that unplugged is to unplug the whole MAFS plug. I have done that before and have driven with my MAFS unplugged (Was doing some testing) and had no CEL light.

I guess it was a hickup. I would take some CRC Electrical Contact Cleaner and clean the MAFS/IAT incase there is anything on there.
Reply With Quote
  #9  
Old 08-27-2006
zabeard's Avatar
who?
iTrader: (8)
 
Join Date: Nov 2004
Location: IN
Posts: 26,045
Glad you finally got it installed!
Reply With Quote
  #10  
Old 08-27-2006
TheForce02's Avatar
Member
Thread Starter
 
Join Date: Jun 2004
Location: Chino, CA
Posts: 846
LOL, yah.

FYI I did un-hook the MAF when I took off the intake tube to install the alternator. I did run the truck for a little bit before re-installing the intake tube and figure this is what pulled the code first. I would figure that the code would go away when I re-plugged everything, but guess not. It's all good now so :D
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
99 Ranger: engine wont turn over, has power, and no check engine light sprx26 General Technical & Electrical 1 03-19-2014 12:07 PM
o/d light, check engine light and rough idle wtf man 2.9L & 3.0L V6 Tech 8 02-23-2014 01:39 PM
problem with engine and check engine light warner.325 SOHC - 2.3L & 2.5L Lima Engines 5 12-09-2009 04:48 AM
Bad Alt, now new alt and Batt light? hotrod88 General Technical & Electrical 3 09-12-2008 06:32 AM
spedometer out + ABS light + check engine light joey v General Technical & Electrical 13 06-17-2008 08:17 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 08:30 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.