Clearing codes???
Clearing codes???
Freshman User
Joined: Sep 2007
Posts: 38
Likes: 0
From: Tampa Bay, Florida
Pony,
If you want to do it quicker you can disconect the battery and then turn on the headlight switch for two minutes then shut it off. This will drain all the capacitors and reset the codes. Then reconnect the battery.
Of course waiting 15 minutes will do it also for sure.
Johnny
1988 Ford F-150 Custom 4.9L long bed 4-speed
1990 Ford Mustang LX 5.0 Hatchback AOD
1993 Ford Mustang LX Coupe 5-speed
..............................God Bless Henry Ford............................................
If you want to do it quicker you can disconect the battery and then turn on the headlight switch for two minutes then shut it off. This will drain all the capacitors and reset the codes. Then reconnect the battery.
Of course waiting 15 minutes will do it also for sure.
Johnny
1988 Ford F-150 Custom 4.9L long bed 4-speed
1990 Ford Mustang LX 5.0 Hatchback AOD
1993 Ford Mustang LX Coupe 5-speed
..............................God Bless Henry Ford............................................
Senior User
Joined: May 2006
Posts: 153
Likes: 0
From: Sidney, Ohio
I never heard about turning on the headlights either. Just d/c the neg. for 15 min or use a scanner.
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Senior User
Joined: Sep 2007
Posts: 193
Likes: 0
From: Indio,California
ok, i've done everything....new tps egr with sensor and iac, and the damn truck still has the check engine light on and idles at 2000rpms....i dont get it. i get codes 63 and 31....i give up 
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Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
31 - PFE or EVP circuit below minimum voltage of 0.24 volts.
63 - TPS circuit below minimum 0.6 volts.
Did you replace the EGR valve or the EVP sensor? Sounds like EVP is your problem for the 31 code. As for the TPS code, not really sure if you have already tried replacing the TPS.
63 - TPS circuit below minimum 0.6 volts.
Did you replace the EGR valve or the EVP sensor? Sounds like EVP is your problem for the 31 code. As for the TPS code, not really sure if you have already tried replacing the TPS.
Senior User
Joined: Mar 2004
Posts: 491
Likes: 0
From: Boyd,TX
Try these places to help find your problem:
www.fordfuelinjection.com/?p=35 EVP sensor
www.fordfuelinjection.com/?p=30 TPS
www.fordfuelinjection.com/?p=35 EVP sensor
www.fordfuelinjection.com/?p=30 TPS
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
The headlight switch is meant to discharge any capacitors in the computer, but your guess is as good as mine as to whether or not it works. If you don't need the computer to re-learn everything, you can simply run the normal diagnostic check (pulling the codes) except when the codes are still flashing, pull the jumper wire that is grounding the STI. This erases the trouble codes but will not reset all of the computer's learned parameters.
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weberr7
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