Dtc P1131 & P1151 - F150online Forums


Dtc P1131 & P1151

Reply
 
 
  #1  
Old 12-07-2006, 08:10 PM
Senior Member
Thread Starter
 
Join Date: Aug 2004
Location: Pasadena, Maryland
Posts: 1,985
Dtc P1131 & P1151

Hello all, I pulled two trouble codes.

DTC P1131 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1

DTC P1151 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2

Ironcially I had my upstream O2 sensors replaced about 2K miles ago after I got my truck custom tuned.

Anyone have any ideas why they would be causing an error? It's dark and cold out now so I haven't physically looked at the sensors but I'll take a look tomorrow. My gas mileage has also gotten significanlty worse.

Thanks in advance.

- Chris

Last edited by ChrisT; 12-07-2006 at 08:14 PM.
Reply With Quote
  #2  
Old 12-08-2006, 05:09 AM
BlueOvalFitter's Avatar
Senior Member
 
Join Date: Sep 2002
Location: USA
Posts: 2,408
Question

Define "custom tuned".
Reply With Quote
  #3  
Old 12-08-2006, 08:05 AM
Senior Member
 
Join Date: Oct 2002
Location: St. Louis (Out in the woods)
Posts: 6,078
Get it custom "untuned". It's screwed up.

Steve
Reply With Quote
  #4  
Old 12-08-2006, 11:44 AM
Senior Member
Thread Starter
 
Join Date: Aug 2004
Location: Pasadena, Maryland
Posts: 1,985
sorry, I'll be a bit more specific. I got in on the group buy from Troyer performance and purchased the XCAL2. Based on my sheets, he recommended I change out my upstream O2 sensors since I was running on my originals. I've been running the 87 per. tune for sometime now so I don't think it has anything to do with my custom tunes.

I just thought it strange that after I replace my upstream O2 sensors they throw a code after 2K miles. Any ideas?
Reply With Quote
  #5  
Old 12-08-2006, 12:36 PM
BlueOvalFitter's Avatar
Senior Member
 
Join Date: Sep 2002
Location: USA
Posts: 2,408
Exclamation

Quote:
Originally Posted by projectSHO89
Get it custom "untuned". It's screwed up.

Steve
I agree!
Reply With Quote
  #6  
Old 12-08-2006, 02:01 PM
Senior Member
Thread Starter
 
Join Date: Aug 2004
Location: Pasadena, Maryland
Posts: 1,985
Guys, I can't see how the tuning has anything to do with it. The truck has been tuned by Troyer Performance via the XCAL2 I ordered last year. I've been running like this for almost a year now.

About a month ago I had the O2 sensors replaced with new Bosch sensors and now a month later I get these codes. Guess I'll take it back to the dealship who replaced the sensors and see what's up.

Last edited by ChrisT; 12-08-2006 at 02:09 PM.
Reply With Quote
  #7  
Old 12-08-2006, 04:13 PM
Senior Member
 
Join Date: Oct 2002
Location: St. Louis (Out in the woods)
Posts: 6,078
..or contact Troyer for advice....
Reply With Quote
  #8  
Old 12-08-2006, 04:30 PM
Technical Article Contributor
 
Join Date: May 2004
Location: Georgia on my mind...
Posts: 6,509
If the tune isn't doing it, then I'd guess you have a vacuum leak. Given that it's a 4.2 liter, I'd think intake gaskets and isolator bolts.
Reply With Quote
  #9  
Old 12-08-2006, 04:39 PM
Senior Member
Thread Starter
 
Join Date: Aug 2004
Location: Pasadena, Maryland
Posts: 1,985
Quote:
Originally Posted by Quintin
If the tune isn't doing it, then I'd guess you have a vacuum leak. Given that it's a 4.2 liter, I'd think intake gaskets and isolator bolts.

I'll give that a shot. I've been reading some about O2 sensors recently, could it be that the new sensors are just doing their job reporting the error and possibly my catalytic converter(s)? are bad? It's the original exhaust system with 87K on it. It does sound like I have a exhaust leak when I lay into the throttle so perhaps it's in my best interest to have the exhaust checked.
Reply With Quote
  #10  
Old 12-08-2006, 07:45 PM
BlueOvalFitter's Avatar
Senior Member
 
Join Date: Sep 2002
Location: USA
Posts: 2,408
Thumbs up

Chris,take those two guys advice;they are Ford techs and know what they are talking about!
Reply With Quote
  #11  
Old 12-09-2006, 03:28 AM
Senior Member
Thread Starter
 
Join Date: Aug 2004
Location: Pasadena, Maryland
Posts: 1,985
Quote:
Originally Posted by BlueOvalFitter
Chris,take those two guys advice;they are Ford techs and know what they are talking about!

I appreciate any and all advice given, especially from three of the more exp. members on this forum. I'm still fairly certain the custom tuning has nothing to do with my issue (or so I hope not). With this type of issue I think I'm going to leave it to the professionals at my local dealership. Thanks fellas.
Reply With Quote
  #12  
Old 03-13-2007, 08:27 PM
Member
 
Join Date: Feb 2007
Posts: 46
intake gaskets and isolator bolts?

Quote:
Originally Posted by BlueOvalFitter
Chris,take those two guys advice;they are Ford techs and know what they are talking about!
I just changed my engine (messed it up with SeaFoam). I installed an engine with 110K miles on it and it runs much better than my other one did before I messed it up. But, 5 miles up the road it threw a code. Autozone read it as P1151. I looked it up and did some research on the Forum and everyone is saying "intake gaskets and isolator bolts". What is the isolator bolts? Not famililar with this. I reused the engine harness and vacuum lines. The rest is from the other engine.
Reply With Quote
  #13  
Old 03-13-2007, 11:16 PM
Junior Member
 
Join Date: Feb 2007
Posts: 9
I must ask. How did you mess up an engine using seafoam? I have used it for years in all types of engine, with great results and zero problems.
Reply With Quote
  #14  
Old 03-14-2007, 05:16 AM
BlueOvalFitter's Avatar
Senior Member
 
Join Date: Sep 2002
Location: USA
Posts: 2,408
Exclamation

I think he introduced it too quickly into the engine and it hydro-locked.
Reply With Quote
  #15  
Old 03-14-2007, 08:58 AM
Member
 
Join Date: Feb 2007
Posts: 46
Quote:
Originally Posted by BlueOvalFitter
I think he introduced it too quickly into the engine and it hydro-locked.
Correct. Used the brake booster line and it sucked it in too fast.
Reply With Quote
 
 
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
violator80
2004 - 2008 F-150
10
01-30-2016 01:09 AM
02RedScroo
V8 Engines
8
10-05-2015 09:26 PM
Raptor05121
Transmissions
5
09-30-2015 08:44 AM
u1cracka
2004 - 2008 F-150
8
09-08-2015 02:29 AM
kolik
1997 - 2003 F-150
7
07-10-2015 10:04 PM


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


Sponsors

All times are GMT -4. The time now is 02:22 AM.