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Author
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Topic: help with code 31
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1FastLX
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Member # 1178
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posted
 
 
well a week ago i noticed that my check engine light came on and off while i was driving the car , also i my cold start idle was a little rough.
well today i pulled the codes and it everything was all good, i got code 11 but in the continous memory part i got code 31 which:
31 (orc*): EVP (EGR Valve Position) or PFE (Pressure Feedback EGR) sensor voltage too low, or EVR (EGR Vacuum Regulator) circuit problems
this was on the Key On Engine Off test.
the Key On Engine running test was good , code 11
How can i fix that and what do i need to replace?
thanks guys
[ December 14, 2003, 05:53 PM: Message edited by: 1FastLX ]
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85 Mustang GT
91 2.3 Coupe
The Westside Strangler
Posts: 138 | Registered: Apr 2002
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white1990stang
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Member # 2307
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posted
i just replaced my evp. its lke 20 buxs. its the white thing on the back of the egr plate. it has an electrical plug going into it on the bottom
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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1FastLX
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Member # 1178
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posted
did your Chech engine light flash while you drive?
is it hard to change?
thanks
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85 Mustang GT
91 2.3 Coupe
The Westside Strangler
Posts: 138 | Registered: Apr 2002
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graylx
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Member # 3919
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posted
my check engine light flashes on and off also. pretty annoying. also runs a little rough at idle.
have not pulled codes yet but wondering if you replaced evp. if so, did it eliminate the flashing check engine light?
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2012 Mustang GT
1989 Mustang LX 5.0 Notch
1995 Impala SS
Posts: 891 | From: Fresno | Registered: Dec 2003
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graylx
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Member # 3919
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posted
my check engine light flashes on and off also. pretty annoying. also runs a little rough at idle.
have not pulled codes yet but wondering if you replaced evp. if so, did it eliminate the flashing check engine light?
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2012 Mustang GT
1989 Mustang LX 5.0 Notch
1995 Impala SS
Posts: 891 | From: Fresno | Registered: Dec 2003
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Stimson
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Member # 51
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posted
You guys should take off your EGR valve and soak it good with carb cleaner. Clean it up good and re-install it. Clear the codes and see if it comes back. If it does, look into replacing the EGR valve. The EGR valve itself fails more often than the EVP sensor behind it. I find that the EGR valve needs to be cleaned every 15-20K miles on 5.O's.
Posts: 2373 | Registered: Jun 2000
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1FastLX
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Member # 1178
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posted
Gray LX
i replaced the evp and cleared the codes.
but you have to pull the codes for your to be sure its the same problem like mine
lates
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85 Mustang GT
91 2.3 Coupe
The Westside Strangler
Posts: 138 | Registered: Apr 2002
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graylx
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Member # 3919
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posted
Checked the codes...Code 31. I had already replaced EGR few thousand miles ago so I replaced EVP and the MIL no longer flashes...
Thanks for the help guys... ![[Smile]](smile.gif)
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2012 Mustang GT
1989 Mustang LX 5.0 Notch
1995 Impala SS
Posts: 891 | From: Fresno | Registered: Dec 2003
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graylx
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Member # 3919
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posted
Checked the codes...Code 31. I had already replaced EGR few thousand miles ago so I replaced EVP and the MIL no longer flashes...
Thanks for the help guys...
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2012 Mustang GT
1989 Mustang LX 5.0 Notch
1995 Impala SS
Posts: 891 | From: Fresno | Registered: Dec 2003
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onesicknotchback
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Member # 3899
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posted
change your map sensor...tipo unlim
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1993 cobra
Posts: 545 | From: bayarea | Registered: Dec 2003
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