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Old 08-22-2013, 07:25 PM
Gedii Gedii is offline
Join Date: Aug 2013
Posts: 9
Default EGR or System Too Lean?

Okay... I was told that I had an EGR sensor that needed to be replaced, but in looking around online I learned the code for that is PO 401. Today I went to the auto store and used their auto scanner and the code came back PO 171, which is a bit different... so I am confused...

Is it possible that the mechanic knows by messing around with the vehicle, that it is indeed the EGR sensor in spite of the reading? Or is there another explanation?

Any help would be appreciated...

P.S. Does anyone know of a good Auto Scanner which will read the problem, and at which bank the problem is located and is also not too expensive?


'98 Ford Ranger, 4 Cylinder 2 WD, Standard

Last edited by Gedii; 08-22-2013 at 07:28 PM.
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Old 08-23-2013, 08:50 AM
POS Racing POS Racing is offline
Ford Rangers
Join Date: Apr 2013
Posts: 208
Default Re: EGR or System Too Lean?

You can always have more than one active code in the truck.

4 Cylinders only have one bank, V6's have 2.

Good stuff here ->

As far as code reader/scanners go I got Torque App for my Android phone and also have a cheap handheld OBDII scanner that I got on Amazon years back. Plus you can take it to Autozone and they can read the codes for free.
1995 2WD, 4 Cylinder, 5 Speed
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dpfe sensor, egr sensor, lean air dtc, p0171, p0401

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