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Code P0401?

Tiny
ASEMASTER6371
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No, there is not.

You need a scan tool as I stated to monitor the voltages. It varies on catalytic converter activity as well as load factors.

Roy
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Monday, January 11th, 2021 AT 10:14 AM (Merged)
Tiny
WHITESHIRTSAMMY
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Okay, let me work on it.
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Monday, January 11th, 2021 AT 10:14 AM (Merged)
Tiny
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Sounds like a plan.

Roy
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Monday, January 11th, 2021 AT 10:14 AM (Merged)
Tiny
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I do not have vacuum at the EGR solenoid.
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Monday, January 11th, 2021 AT 10:14 AM (Merged)
Tiny
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You should have manifold vacuum at the solenoid. When the solenoid opens, it will send vacuum to the EGR. That is not the issue for the 401.

Check all your vacuum lines for cracks or breaks.

Roy
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Monday, January 11th, 2021 AT 10:14 AM (Merged)
Tiny
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I am still working on this.
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Monday, January 11th, 2021 AT 10:14 AM (Merged)
Tiny
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Okay, I am here.

Roy
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
WHITESHIRTSAMMY
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Okay, all new vacuum tubing in the truck. I cleared the code, drove the vehicle and now the code is P0402.
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
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Did you replace the sensor?

Roy
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
WHITESHIRTSAMMY
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No, same delta feedback pressure sensor as when I was getting P0401.
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
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Replace the sensor. That was a very common failure for the 401 code.

Roy
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
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Is there a brand I should stay away from?
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
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I would get an OEM from Ford. I have had trouble with aftermarket sensors.

Roy
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
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Okay, that fixed it.
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Monday, January 11th, 2021 AT 10:15 AM (Merged)
Tiny
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Good job.

Roy
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Monday, January 11th, 2021 AT 10:15 AM (Merged)

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