Loud moaning noise...

[navair133]

Has anyone experienced loud moaning noise from left rear? Heard crazy loud moaning sound then car died at stop light. Was able to start and pull over and tried to reflash tune-showed trouble code B123A. Deleted trouble code and car ran okay, only to do again 24 hours later.
Intend to take to dealer but having trouble reflashing back to OEM tune, Livernois tuner reads error 77.

Has anyone experienced this problem? I have 50,000 miles on the car. Maybe fuel pump?
Thanks.

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[ElAviator72]

Has anyone experienced this problem? I have 50,000 miles on the car. Maybe fuel pump?
Thanks.

Holy bat guano!!! You have to be the highest mileage Ecoboost owner out there... :eyebulge:

 

[stevnoof]

Do u run over a cat?

 

[jrock]

B123A? Could it have been B1238 Over Temperature Fault

Good Luck....

 

[Livernois Motorsports]

There is a missing character in the DTC code, but all of the "B" codes are going to be related to the body control module. I made a few calls and here are all of the codes and correlating issues:

B1231 Longitudinal Acceleration Threshold Exceeded
B1233 Glass Break Sensor Failure
B1234 Mirror Switch Invalid Code
B1235 Window Feedback Failure
B1236 Window Feedback Loss of Signal
B1237 Window Feedback Out of Range
B1238 Over Temperature Fault
B1239 Air Flow Blend Door Driver Circuit Failure

This is a situation that I would flash the car back to stock, and take the car into the dealership. There is a sensor fault that the car is reading somewhere inside of the BCM.
[MENTION=21778]jrock[/MENTION], it is unlikely to be a temp fault because the car did start right back up without issue. If there were a temp related issue a few seconds of not running would not remedy this.

 

[jrock]

FYI, The 8 could have looked like an A. That is what I ask.
@Livernois, In theory, the car could have stop running due to a temp fault B1238 and start up once the fault was cleared. I bet your asking how can the car produced an over temp fault without having cooling issues? Again, Good Luck...

 

[navair133]

Thanks. Trying to reflash to stock but getting 77 error code. I am taking to dealer tomorrow.
Yep, 50,100 miles. Bought it in 10/14. Guess I am a beta tester! I will post what t dealer says about problem.

 

[Livernois Motorsports]

The #77 means that the Loader didn't get a valid battery voltage report from the ECU. This may be a communication problem, or the key on/off process was done wrong.

 

[ElAviator72]

Thanks. Trying to reflash to stock but getting 77 error code. I am taking to dealer tomorrow.
Yep, 50,100 miles. Bought it in 10/14. Guess I am a beta tester! I will post what t dealer says about problem.

Don't think I even saw my first S550 Mustang in the wild until Jan. 2015...you must have bought like the first Ecoboost car off the lot down there in Cali :lol:

 

[stevnoof]

I remember the first few weeks driving around in 2014. Turning lots of heads

 

[ElAviator72]

I remember the first few weeks driving around in 2014. Turning lots of heads

I still turn lots of heads around here...the Mustang is a pretty rare beast in this part of the country. Your neighbors think down on you if you don't have a Honda or Toyota in your garage, too...;) If I watch cars waiting to turn, people waiting for the bus, etc. in my rear view mirror, I notice their head turns to follow my car

 

[navair133]

Got it the first week the mustang was in southern Cali-10/11/14 purchase date. Just two were on the lot, a white GT and my black eco premium with the exact package I would have ordered, except I probably would have ordered the redline interior. It definitely turned heads for a couple of months. Even a motorcycle cop stopped me to look at it. Got a little tiring but it was still cool. I sure was glad to see others on the road.

 

[navair133]

Loud moaning sound at left rear followed by dying at idle happened again. Ran diagnostic with tuner and P1450 code came up as well as B1215.
Looked up online and found this: "P1450–Inability of Evaporative Emission Control System to Bleed Fuel Tank."

I am not sure if the code applies to 6th gen mustangs but sound is coming from rear, near fuel tank. Anyone run into this? I reflashed tune and car is running okay-for now.

Thanks.

 

[v8440]

Maybe the noise was some sort of pressure relief farting and letting excessive fuel tank pressure off?

 

[navair133]

Thanks. Sounds possible. Don't know why it then ran very rough and died. When I ran diagnostic and deleted codes it started up fine and no moaning-for now.
I may call my dealer and present the issue in a hypothetical sort of way...

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