engines codes please help

J

jwilson2916

New Member

Aug 5, 2008

2

0

0

Chandler, AZ

Aug 5, 2008

#1

• Aug 5, 2008

• #1

i have a 95 mustang cobra 5.0. i recently failed emissions, to much nox. i tested it and got codes 172:Heated oxygen sensor indicates lean condition, right side... 175: heated oxygen sensor unable to swich, left side....and 334 EGR valve position sensor voltage above closed limit....can anyone lead me the the right direction

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Aug 6, 2008

#2

• Aug 6, 2008

• #2

Check the EGR position sensor voltage with the key on, car off. It should be about 1/2 volt.

Be sure you dont have any vac leaks. Look for ~20" hg of vac at idle.

 

desertcox05

New Member

Oct 3, 2007

379

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0

south atlanta

Aug 6, 2008

#3

• Aug 6, 2008

• #3

try cleaning the maf too, and if all else fails pull the spout, drive it like that to get tested, after it passes then plug the spout back in. that's what i had to do to get it to pass

 

J

jwilson2916

New Member

Aug 5, 2008

2

0

0

Chandler, AZ

Aug 14, 2008

#4

• Aug 14, 2008

• #4

thanks guys ill try it out