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2001 Ford Expedition PO171 OEM#

Tiny
01EXPEDITION
  • MEMBER
  • 2001 FORD EXPEDITION
  • V8
  • AWD
  • AUTOMATIC
  • 111,000 MILES
You just replied to me regarding this issue - thank you. I disconnected the positive battery cable for 20 minutes and reconnected it. The Service Engine Soon light went off. I did this because I was told I had to reset the computer because the light won't go out even if I fixed it. Is this true? Did I do wrong by disconnecting the battery? Will the light just come on again if I didn't fix this issue?

Thanks
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Friday, February 5th, 2010 AT 8:43 PM

1 Reply

Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

Yes you were wrong to do so, but not because of the possibility of the engine light coming back on. It is because you can cause a Voltage Spike and Fry your Computer. When you make a repair and need engine light turned off, just go by your local parts store and ask them to do it for you.

.
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Friday, February 5th, 2010 AT 8:53 PM

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