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Vincent Keene
 Post subject: Miata CEL
PostPosted: Wed Jul 22, 2009 1:34 pm 
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P0470 "Exhaust Pressure Sensor Malfunction"

My '96 M-edition has thrown this code and I can't seem to find any information as to the fix anywhere. The Miata has no such sensor that I'm aware of so I'm lost. Next month the inspection is due so I have to figure it out. Miata.net offered no solution, which was odd since more than one person has had the code and has posed the question.

No way that I take any of my cars to a dealer so don't even suggest that. Can any of you fellow Miata guys help me please?

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Vincent Keene
'06 Ford Mustang GT (track rat)
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'07 Ford Fusion SE (205,000 miles and counting)
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'93 Acura Integra (Team SWB 24HOL Car)


Last edited by Vincent Keene on Wed Jul 22, 2009 1:56 pm, edited 1 time in total.

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Chris Brown
 Post subject:
PostPosted: Wed Jul 22, 2009 1:45 pm 
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Aww, what a cute little car!
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http://forum.miata.net/vb/archive/index ... 54404.html

...possible causes of the P0470
1) EGR boost sensor malfunction
2) Problems with the EGR boost sensor vacuum hose.
3) Problem (short or open) with the wiring from ECM terminal 3I to the EGR boost sensor terminal B
4) Problem with the wiring from ECM terminal 3O to the EGR boost sensor terminal C
5) Open circuit in wiring from ECM terminal 3N to EGR boost sensor terminal A

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Vincent Keene
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PostPosted: Wed Jul 22, 2009 1:57 pm 
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Chris Brown wrote:
http://forum.miata.net/vb/archive/index.php/t-54404.html

...possible causes of the P0470
1) EGR boost sensor malfunction
2) Problems with the EGR boost sensor vacuum hose.
3) Problem (short or open) with the wiring from ECM terminal 3I to the EGR boost sensor terminal B
4) Problem with the wiring from ECM terminal 3O to the EGR boost sensor terminal C
5) Open circuit in wiring from ECM terminal 3N to EGR boost sensor terminal A


Cool thanks. I did a search on Miata.net and found none of that. :?

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Vincent Keene
'06 Ford Mustang GT (track rat)
'15 Dodge Charger R/T (yeah, it's got a HEMI!)
'07 Ford Fusion SE (205,000 miles and counting)
'98 Chevy Z-24 (retired)
'93 Acura Integra (Team SWB 24HOL Car)
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Frank Catena
 Post subject:
PostPosted: Wed Jul 22, 2009 2:06 pm 
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Joined: Wed Aug 27, 2003 1:08 pm
Posts: 418
TSB on that one. Check the hose first.

http://www.miata.net/garage/tsb/s004_97.html

Frank
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Patrice Bousquet
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PostPosted: Thu Jul 23, 2009 9:36 am 
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A co-worker had if remember right the same error on his 96 and it was the hose.

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Michael Westerfield
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PostPosted: Thu Jul 23, 2009 12:50 pm 
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Vincent Keene wrote:
Chris Brown wrote:
http://forum.miata.net/vb/archive/index.php/t-54404.html

...possible causes of the P0470
1) EGR boost sensor malfunction
2) Problems with the EGR boost sensor vacuum hose.
3) Problem (short or open) with the wiring from ECM terminal 3I to the EGR boost sensor terminal B
4) Problem with the wiring from ECM terminal 3O to the EGR boost sensor terminal C
5) Open circuit in wiring from ECM terminal 3N to EGR boost sensor terminal A


Cool thanks. I did a search on Miata.net and found none of that. :?


I think you need a degree from a college to figure that out.
:D
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Ryan Holton
 Post subject:
PostPosted: Thu Jul 23, 2009 12:54 pm 
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Michael Westerfield wrote:
Vincent Keene wrote:
Chris Brown wrote:
http://forum.miata.net/vb/archive/index.php/t-54404.html

...possible causes of the P0470
1) EGR boost sensor malfunction
2) Problems with the EGR boost sensor vacuum hose.
3) Problem (short or open) with the wiring from ECM terminal 3I to the EGR boost sensor terminal B
4) Problem with the wiring from ECM terminal 3O to the EGR boost sensor terminal C
5) Open circuit in wiring from ECM terminal 3N to EGR boost sensor terminal A


Cool thanks. I did a search on Miata.net and found none of that. :?


I think you need a degree from a college to use teh Google.
:D


WINNER!

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Chris Brown
 Post subject:
PostPosted: Thu Jul 23, 2009 2:31 pm 
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Aww, what a cute little car!
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Michael Westerfield wrote:
Vincent Keene wrote:
Chris Brown wrote:
http://forum.miata.net/vb/archive/index.php/t-54404.html

...possible causes of the P0470
1) EGR boost sensor malfunction
2) Problems with the EGR boost sensor vacuum hose.
3) Problem (short or open) with the wiring from ECM terminal 3I to the EGR boost sensor terminal B
4) Problem with the wiring from ECM terminal 3O to the EGR boost sensor terminal C
5) Open circuit in wiring from ECM terminal 3N to EGR boost sensor terminal A


Cool thanks. I did a search on Miata.net and found none of that. :?


I think you need a degree from a college to figure that out.
:D


zing

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Wes Eargle
 Post subject:
PostPosted: Thu Jul 23, 2009 3:33 pm 
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