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CEL codes P0402 & P0174 #1407945 10/10/05 07:40 PM
Joined: Mar 2003 Posts: 32 Hamilton, Ontario, Canada G grossgo OP New CEG\'er
OP grossgo New CEG\'er G Joined: Mar 2003 Posts: 32 Hamilton, Ontario, Canada	Got a CEL and downloaded the code, (two of them). It comes up P0402 (EGR Flow Excessive) and P0174 (System Too Lean. Bank 2). There are NO apparent drivability symptoms. In fact she's running great. Any ideas? Suggestions? BTW, I deleted these codes and they came up again in a day, so it's not some kind of fluke. Oh yeah, this is a '99 SVT with approx. 136,000 klms. on her. Thanks, people Glen

Re: CEL codes P0402 & P0174 #1407946 10/10/05 07:54 PM
Joined: Jun 2005 Posts: 5,345 Virginia, USA T Tony2005 Addicted CEG\'er
Tony2005 Addicted CEG\'er T Joined: Jun 2005 Posts: 5,345 Virginia, USA	Originally posted by grossgo: Got a CEL and downloaded the code, (two of them). It comes up P0402 (EGR Flow Excessive) and P0174 (System Too Lean. Bank 2). There are NO apparent drivability symptoms. .. Glen Pull fuse 4 and 11 for a minute or so. If the codes come back (after a few days), try this thread. http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=v6maint&Number=337774&page=&view=&sb=5&o=&vc=1 After cleaning, pull fuses 4 and 11 again to clear the memory. "Always do the cheap and easy ones first." 1996 V6 ATX 96K miles

Re: CEL codes P0402 & P0174 #1407947 10/10/05 10:32 PM
Joined: Oct 2002 Posts: 2,408 R Rogerm60 Hard-core CEG'er
Rogerm60 Hard-core CEG'er R Joined: Oct 2002 Posts: 2,408	Originally posted by grossgo: Got a CEL and downloaded the code, (two of them). It comes up P0402 (EGR Flow Excessive) and P0174 (System Too Lean. Bank 2). There are NO apparent drivability symptoms. In fact she's running great. Any ideas? Suggestions? BTW, I deleted these codes and they came up again in a day, so it's not some kind of fluke. Oh yeah, this is a '99 SVT with approx. 136,000 klms. on her. Thanks, people Glen If the O2's have not been replaced it's high time to do so. Excessive EGR flow will cause a rough low idle. If you never have that problem I would say your DPFE is getting a bit whacked. If you do have a bad idle it could be the DPFE or the EVR is leaking. "Those who cannot remember the past are condemned to repeat it" -George Santayana

Re: CEL codes P0402 & P0174 #1407948 10/11/05 11:34 PM
Joined: Mar 2003 Posts: 32 Hamilton, Ontario, Canada G grossgo OP New CEG\'er
OP grossgo New CEG\'er G Joined: Mar 2003 Posts: 32 Hamilton, Ontario, Canada	Thanks for the suggestions guys. I think I'll try the UIM cleaning on Sunday----the earliest possible day for me, AND the only day sunshine is forecast this week GT

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