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Check engine light appeared (DTC Code P04F0) - UPDATE

Messages
19
Likes
6
Location
Nevada
#1
Hi everyone,

Still relatively new to owning a Fiesta ST, only driven for about 100-140 miles (received it on November 16th, so less than a month of ownership).

Sadly, I just got a check engine light while driving on the highway.

I was driving perfectly normally, no issues on the way to some stores. Then on the way back, I decided to go about 85% full throttle (around 4k RPM on 5th gear on the highway), then a check engine light appeared.

Thankfully I was able to make it back home, without any issues, checked underneath the car and the engine bay....no major issues can be seen, other than some rattling / ticking noises which I believe is "normal" for the GTDI engines from what I've heard.

Went to autozone, 0.5 miles away from where I was and decided to get it checked since I couldn't find my old OBD2 scanner, attached is what they could find.

Doesn't look like it's a common issue for the fiesta ST after trying to search the forums. It looks like it has happened to other Ford models however. I still haven't been able to find an answer anywhere as to what it could be though.

It's a 2019 with 32.9k miles, only mod from what I can see is a whoosh intake tube. Will be going to the dealership, but for now, has anyone else run into this issue? Any help or insight is greatly appreciated as always!! Fiesta light.jpg
 


OP
F
Messages
19
Likes
6
Location
Nevada
Thread Starter #2
Hi everyone,

I've kind of left the fiesta on the backburner a little because of the holidays + constantly running into issues and it being at the dealership.

I thought I'd give a follow up since the original post.

I finally got the car back from the dealership ( it went to the dealership twice for issues since I was last here).

Today i finally got the chance to drive the car, but the check engine light came on for a THIRD time within the past month or so.

I got the same exact DTC code as I did last time.
As you can see from the picture, I've driven the car roughly 60 miles since I last had it.

I am DESPERATE now, as I haven't had a single day where I could enjoy this car since buying it on November.

Has anyone had this issue / DTC code before? I am desperate for answers or any lead.

So far the dealership has replaced the air intake hose, and the purge valve in the past month.

Any help or advice would be GREATLY APPRECIATED.

20250112_134744.jpg
 


TyphoonFiST

9000 Post Club
Premium Account
Messages
11,721
Likes
8,218
Location
Rich-fizzield
#3
Hi everyone,

I've kind of left the fiesta on the backburner a little because of the holidays + constantly running into issues and it being at the dealership.

I thought I'd give a follow up since the original post.

I finally got the car back from the dealership ( it went to the dealership twice for issues since I was last here).

Today i finally got the chance to drive the car, but the check engine light came on for a THIRD time within the past month or so.

I got the same exact DTC code as I did last time.
As you can see from the picture, I've driven the car roughly 60 miles since I last had it.

I am DESPERATE now, as I haven't had a single day where I could enjoy this car since buying it on November.

Has anyone had this issue / DTC code before? I am desperate for answers or any lead.

So far the dealership has replaced the air intake hose, and the purge valve in the past month.

Any help or advice would be GREATLY APPRECIATED.

View attachment 65088
So its still under warranty? If so id be brining it back to them to Fix it. The only other thing is the Charcoal canister solenoid*
 




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