2017 5.0 Check Engine P2251 & P2254 - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 7 (permalink) Old 12-02-2019 Thread Starter
Rookie
 
FIFTiAna's Avatar
 
Joined: Dec 2019
Location: Bay Area
Posts: 5
 
Garage
2017 5.0 Check Engine P2251 & P2254

So, I recently got tuned and Corsa LT headers installed and now im getting codes P2251 & P2254 Negative Current Control Circut/ Open Bank 1/2 Sensor 1. has anyone had this issue? does anyone know how to fix I already emailed my Tuner waiting for a response anyone else have these issues? could it be fuel change and tune? i haven't found any melted wires or bad wire harness

FIFTiAna is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 12-02-2019 Thread Starter
Rookie
 
FIFTiAna's Avatar
 
Joined: Dec 2019
Location: Bay Area
Posts: 5
 
Garage
Codes that came up

Attached Thumbnails
Click image for larger version

Name:	401E74C3-47E9-4B73-91A6-4B2DFF27F8D9_1575329385189.jpg
Views:	10
Size:	425.4 KB
ID:	612431   Click image for larger version

Name:	A0FD57A5-A5B4-4173-84D5-14DE26795AD3_1575329405927.jpg
Views:	10
Size:	461.6 KB
ID:	612433  

"If you're not 1st you're Last"
FIFTiAna is offline  
post #3 of 7 (permalink) Old 12-02-2019
SHELBY GT 350 Member
4.6L Member
S197 Member
 
JBert's Avatar
 
Joined: Jan 2011
Location: Central Massachusetts
Posts: 9,102
           
I'm no expert on this but a quick Google says it is related to Oxygen (O2) sensors
https://www.obd-codes.com/p2251

Which kinda makes sense because they are disturbed and relocated by headers installation . . . simplest thing would be that the O2 sensors were not correctly reinstalled or plugged in; also could have to do with the changed signal that comes from moving the O2 sensors downstream because the headers are longer

might also have to do with the rear O2 sensors -- were they removed along with the catalytic converters when you installed the headers?

first make sure the O2's are physically OK ; then the tune might need to be adjusted

| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
JBert is offline  
 
post #4 of 7 (permalink) Old 12-04-2019 Thread Starter
Rookie
 
FIFTiAna's Avatar
 
Joined: Dec 2019
Location: Bay Area
Posts: 5
 
Garage
Thanks! So I guess S550 with LTs are known for throwing this code. They have to be relocated/positioned further out of the collector. sooo with that being said she's on the way back out to the shop and this should resolve the issue. I will post updates as to whether or not its resolved! appreciate your feedback ^^^

"If you're not 1st you're Last"
FIFTiAna is offline  
post #5 of 7 (permalink) Old 12-06-2019
PONY Member
 
Jackson3010's Avatar
 
Joined: Apr 2014
Location: Brawley
Posts: 648
 
Any o2 code with sensor 1 is the front o2 and your tuner should have warned you about this. The o2 sensor is installed at the wrong angle. You need to install the o2 at a angle to keep moisture from shorting the sensor out
Jackson3010 is offline  
post #6 of 7 (permalink) Old 1 Week Ago Thread Starter
Rookie
 
FIFTiAna's Avatar
 
Joined: Dec 2019
Location: Bay Area
Posts: 5
 
Garage
Update! Everything was fixed/corrected for the sensors codes were still coming up! Swapping the ECU now 😕 I miss my car!!!

"If you're not 1st you're Last"
FIFTiAna is offline  
post #7 of 7 (permalink) Old 1 Week Ago
PONY Member
 
FuelforFire87's Avatar
 
Joined: Apr 2011
Location: Lombard
Posts: 412
 
I would guess that you have bad o2 sensor extensions. This has been an issue with headers and o2 extensions with the coyote engine even from the first gen s197 platform. I really don't see how replacing the ecu would solve the problem. Sounds like the shop you took your car to is ripping you off. I would first check that your o2 sensors are plugged in correctly and that you can read AFR (Air/Fuel Ratio)banks 1 and 2 from your tuning device. If its not reading right you either have bad o2 sensors or the extensions are bad. Ran into a similar issue when i had bbk headers installed on my 14 GT. I dont remember what code i was getting but it had to do with one of my o2 extensions being bad. Luckily i was able to connect the sensors to the harness without having to use the extensions and that solved it. Good luck with getting it sorted out.

Sent from a Chevy S10+

2014 Mustang GT 6R80, Procharger Stage 2 D1SC, BBK 85mm TB, Boss IM, Sai Li fuel system. Circle D 3C, 1-7/8" Kooks Long Tubes w/Offroad X Pipe, Lethal Over-Axle Pipes, Corsa Quad Axle-Back, Eibach Pro System Plus, BMR K member, Shaftmasters DS, Forgestar CF-5 Wheels and Nitto NT05 tires. Lund Tuned

Lots of suspension goodies and some other stuff I can't remember.
FuelforFire87 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On

 
For the best viewing experience please update your browser to Google Chrome
 


Search Engine Friendly URLs by vBSEO 3.6.1