Question about 2002 Ford Explorer

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My sister 2002 ford explorer sport trac check engine light came on and she took here vehicle to autozone to have it checked and they gave here a paper saying troubleshooting p1400 what is this?? and how do i fix the broblem?

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P1400 DPF EGR Sensor
Circuit Low Voltage Detected

I understand what the valve does, but
don't know exactly where to have you look
for it, or if it really failed without testing it

If you want to chance just replacing it, like
everyone seems to do,follow the vacuum
hoses away from the EGR Valve, and you should
find a small sensor in the vauum hoses with
a wire connector on it.

Posted on Mar 16, 2011

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