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1997 Nissan Altima P0400

Tiny
OHYEA
  • MEMBER
  • 1997 NISSAN ALTIMA
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
I just recently gotten the code p0400 yesterday but I also had the code p0171 for like a week, I have been searching up ways to fix this and says clean the egr valve now if I do this is it possible for both codes to go away?
Thursday, January 29th, 2015 AT 4:22 PM

5 Replies

Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
You need to clean the egr passages not just the valve for the p0400 and it is not related to the p0171 which is a lean code and in you case most likely a mass air flow sensor or leaking intake gasket.
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Thursday, January 29th, 2015 AT 4:40 PM
Tiny
OHYEA
  • MEMBER
  • 153 POSTS
Ok thanks, because the p0171 code comes and goes so maybe it isnt something major?
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Thursday, January 29th, 2015 AT 4:46 PM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
Your welcome. Most likely it is the mass air flow sensor. But could be the intake gaskets.
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Thursday, January 29th, 2015 AT 4:49 PM
Tiny
OHYEA
  • MEMBER
  • 153 POSTS
Hello, I cleaned out the egr and passage ways like you said and it worked, I also found out what was causing the p0171 code and it was the air tube that connects the throttle body and the MAF it was all ripped up underneath, so I put duct tape around it to seal it until I get a new one. Wanna thank you again for helping me. :)
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Tuesday, February 3rd, 2015 AT 12:55 PM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
You are very welcome, I am glad that you got it fixed. Thank you for choosing 2 carpros.
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Tuesday, February 3rd, 2015 AT 4:35 PM

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