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What needs fixed for a code 31

Tiny
ANTONY CONNER
  • MEMBER
  • 1991 FORD MUSTANG
  • 5.0L
  • V8
  • RWD
  • AUTOMATIC
  • 89,000 MILES
I read the codes and got a code 31 the scanner said 1.(Cars only) EVAP or PFE circuit below minimum voltage 2. (Trucks only) EGR valve control sensor fault (ex. V8 models) 3.(Trucks only) EVAP control system below minimum voltage. So my question is what do I need to fix this problem on my car?
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Sunday, February 19th, 2017 AT 7:15 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hey ANTONY,

There is a EGR pressure sensor that goes out becasue of a particularly plugged catalytic converter. Check the bottom of the sensor to see if its burned out.

Here is a guide to replace the cat if that what the problem is.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

and

https://www.2carpros.com/articles/catalytic-converter-replacement

Please run some tests and get back to us so we can continue helping you.

Best, Ken

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Wednesday, February 22nd, 2017 AT 2:14 PM

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