Check engine light at ~100 mi (All O2 sensors dead)

[oxfordS650]

Bought my ‘24 GT just a few days ago, and on my second day of ownership at about 100mi the CEL popped up.

Turns out all of my oxygen sensors were dead. The service guy was helpful in running the codes and showing that air/fuel ratio was stuck at 14. It’s been at the shop for 2 days awaiting new sensors. Apparently the 7G sensors are different from the last gen.

Any ideas on what may have caused this?

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[Karguy]

That is crazy as I have never heard about a 02 sensor failing at 100 miles…100K miles maybe but definitely not after after burning less than half a tank of gas…

 

[samson]

Sheesh, I've never heard of this either. Sorry you are having to deal with this.

 

[keithwalton]

They were probably dead on arrival and the ecu attempted to compensate for a while and through a CEL when it ran out of compensation.

 

[Q6543]

My money is pinched wire harness somewhere.
It can happen.

 

[Ford Motor Company]

Bought my ‘24 GT just a few days ago, and on my second day of ownership at about 100mi the CEL popped up.

Turns out all of my oxygen sensors were dead. The service guy was helpful in running the codes and showing that air/fuel ratio was stuck at 14. It’s been at the shop for 2 days awaiting new sensors. Apparently the 7G sensors are different from the last gen.

Any ideas on what may have caused this?

Hi there! Could you privately message us with your VIN and the name and location of your Ford dealer so I can look into this check engine light concern? Thank you!

 

[oxfordS650]

Hi there! Could you privately message us with your VIN and the name and location of your Ford dealer so I can look into this check engine light concern? Thank you!

Done!

 

[oxfordS650]

Update:

Got a call from the dealer that the vehicle was ready. I drove up there and they pull it up and break the news that the check engine light is back on. They ran the codes and said same codes as before.

Disappointing to say the least.

 

[oxfordS650]

Update:

I have the vehicle back. The dealer and Ford were very helpful in communicating the issues and were accommodating.

Turns out there was a some sort of defect with a pin on the wiring harness leading to the PCM.

 

[Marty Monroe]

Bought my ‘24 GT just a few days ago, and on my second day of ownership at about 100mi the CEL popped up.

Turns out all of my oxygen sensors were dead. The service guy was helpful in running the codes and showing that air/fuel ratio was stuck at 14. It’s been at the shop for 2 days awaiting new sensors. Apparently the 7G sensors are different from the last gen.

Any ideas on what may have caused this?

My 2024 GT 401a cvt Oct 2023 engine light on 300 miles. Brought to dealer broken damper assembly front nose, needed to remove bumper to replace
On another issue, anyone have problems with creaking of break pedal? Just annoying, this is my 6th GT cvt used to be $30 k now at $61,000 these issues should not occur IMO

 

[H8N_PPL]

Update:

I have the vehicle back. The dealer and Ford were very helpful in communicating the issues and were accommodating.

Turns out there was a some sort of defect with a pin on the wiring harness leading to the PCM.

I had the very same thing happen in my Dark Horse at ~300 miles. I dropped it off after making an appointment with a local Dealership and they found a wire completely sticking out of the connector in my ignition harness...same robot must have made my cables too!

Glad to hear yours was an easy (yet inconvenient) fix!

Aaron

 

[IFFV68]

I had the very same thing happen in my Dark Horse at ~300 miles. I dropped it off after making an appointment with a local Dealership and they found a wire completely sticking out of the connector in my ignition harness...same robot must have made my cables too!

Glad to hear yours was an easy (yet inconvenient) fix!

Aaron

Is there any common built date that this is happening to or is this something random?
Our GT Mustang just arrived by rail last Thursday in Denver.
I should be able to pick it up next week.
Mine was built April 26- April 28, 2024.

 

[jimbo67]

Is there any common built date that this is happening to or is this something random?
Our GT Mustang just arrived by rail last Thursday in Denver.
I should be able to pick it up next week.
Mine was built April 26- April 28, 2024.

If not, at least you will know what to look for. Knowledge is power. Lots of good stuff on this forum. We are slowly becoming unicorns. I say stuff seems pretty random.

 

[Wiley Marmot]

625 miles on mine; no issues/CEL so far!

 

[jimbo67]

625 miles on mine; no issues/CEL so far!

5800 miles so far no issues other than the usb port doesn't work. I changed it out with my f150 works fine. I don't use it. I'll get one and put it in myself at some point. I noticed a sticker on it, if dropped replace. Lol Not a big deal, can't imagine dropping it off at the dealer for that. I'll take that as my only issue.

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