P0172 2014 3.5L Ecoboost? - F150online Forums

P0172 2014 3.5L Ecoboost?


Old 04-13-2018, 11:12 PM
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P0172 2014 3.5L Ecoboost?

Changed plugs. Long term fuel trim on both banks is going to -25 at idle. Both banks go normal when rpm's increase.

My OBD is showing catalyst = not passed, O2 sensor = not passed, O2 sensor heater = not passed.

Any suggestions? Much appreciated!

Where is MAF in this truck? I'd like to clean/test it.

I found the 3 MAP's and replaced one of them that tested bad.
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Old 04-13-2018, 11:39 PM
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You don't have a MAF. You do have something that looks like a MAF, but it's an IAT sensor.
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Old 04-16-2018, 04:53 PM
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Location: Cabot, AR
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P0172 is bank 1 rich condition. The MAP sensors are not able to tell bank 1 from bank 2. The furthest downstream is in the center of the intake manifold.

Can you check the duty cycle in injectors 1,2,3?
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