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Code P219A?

Tiny
LEWISC13B
  • MEMBER
  • 2014 FORD MUSTANG
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 37,000 MILES
I have the car listed above with slight modifications such as long tube headers, high flow cat x-pipe, and a tune. I randomly got a DTC code P219A that I can't seem to fix. I have changed the O2 sensors and MAF to try and solve the issue and neither worked. I have noticed the code will come on after some "spirited" V8 driving but will go away if I drive it like a normal human being lol. Furthermore, I have noticed at idle my LTFT are high, around 14-18%, but as soon as I apply the gas pedal, they drop to roughly 3-5% and STFT are close to 0. I will include the freeze frame data and other photos that may help.
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Friday, March 1st, 2024 AT 5:48 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,320 POSTS
Hi,

The high LTFT indicates the computer is trying to add fuel to a lean fuel mixture. It can be caused by several things including a vacuum leak, an exhaust leak, even a leaking dipstick.

I attached a list below. Check some of the simple things. Also, pay attention to see if there are any exhaust manifold leaks (header) pre-oxygen sensor.

Let me know.

Joe

See pic below.
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Saturday, March 2nd, 2024 AT 1:51 PM

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