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Old 09-03-2009, 15:31   #1 (permalink)
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transmission and p0401 code

Just got my transmission rebuilt on my 98 f150 and drove a cycle and now get p0401 EGR recirculation code. Does transmission or anything related have anything to do with this code.
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Old 09-03-2009, 15:40   #2 (permalink)
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Re: transmission and p0401 code

It's possible the hoses to the DPFE got knocked off and it's not getting a signal from the sensor. It could also be something unrelated. What engine do you have?
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Old 09-03-2009, 16:43   #3 (permalink)
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Re: transmission and p0401 code

got a v8 4x4. I checked all the hoses and all looks fine. ??
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Old 09-03-2009, 16:52   #4 (permalink)
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Re: transmission and p0401 code

Which one? 4.6 5.4 etc.
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Old 09-03-2009, 16:56   #5 (permalink)
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Re: transmission and p0401 code

4.6l
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Old 09-03-2009, 17:12   #6 (permalink)
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Re: transmission and p0401 code

Probably a hose off. If not something wrong with the DPFE circuit.

Code P0401-Exhaust Gas Recirculation (EGR) flow was too low during EGR flow test. The PCM expects DPFE signal voltage to increase when the EVR duty cycle is increased.
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Old 09-03-2009, 17:37   #7 (permalink)
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Re: transmission and p0401 code

Here's some additional info.
OBD-II Trouble Code: P0401 Insufficient EGR Flow
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Old 09-03-2009, 20:14   #8 (permalink)
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Re: transmission and p0401 code

Is it possible the pcm went bad????
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Old 09-03-2009, 20:46   #9 (permalink)
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Re: transmission and p0401 code

I doubt it. I'd check for a flow in the system. Those hoses can be knocked off easily.
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