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Code P0403

Tiny
SCRAGGY29
  • MEMBER
  • 2008 NISSAN PATHFINDER
  • 2.5L
  • 3 CYL
  • TURBO
  • 4WD
  • MANUAL
  • 113,000 MILES
Had fault codes that say the EGR valve is faulty, so I replaced this with another one it wasn’t genuine so maybe that is faulty as well but same code? Any ideas? Could both EGR valves be faulty? I know these cheaper ones aren’t great? I can clear code but then after a while it’s back, wanted see if could try something else before ordering replacement EGR. Thanks in advance.
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Thursday, February 25th, 2021 AT 8:04 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

What is the code number?

Yes, some of the aftermarkets do not work as well as the OEM valves.

https://www.2carpros.com/articles/how-emission-control-systems-work

I attached a YouTube video from us about how the valve works and testing it.

https://www.youtube.com/watch?v=DqUCbbKdWf4

Roy
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Thursday, February 25th, 2021 AT 8:18 AM
Tiny
SCRAGGY29
  • MEMBER
  • 2 POSTS
Thank you. So if a faulty valve would through the code out? Maybe it wasn’t good at all and replaced with a dud valve?
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Thursday, February 25th, 2021 AT 8:56 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes it is possible. I would get a new one from the dealer.

Roy
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Thursday, February 25th, 2021 AT 9:02 AM

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