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2001 Honda Odyssey P0420

2001 Honda Odyssey, Code P0420 came on after 200 miles of changing an EGR valve. EGR was changed as it has a code for low flow in EGR system. Any advice..

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6ya6ya
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Posted on Jan 02, 2017

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freetek
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SOURCE: EGR valve & 3rd gear pressure switch

I highly recommend you buy an aftermarket service manual from Haynes or Chilton.
They are based on a complete tear-down and will not only help you with this problem but will give you an idea if the service shop is being honest about the amount of labor involved.

EGR valves are normally found on the exhaust manifold or header.
This is where they get the gases that are recirculated into the intake.

The other problem I can't comment on but the manual would surely help.

Posted on Jun 18, 2008

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SOURCE: 1999 honda odyssey-engine stalls while driving-electric is fine-

Maybe the solution
There is a recall on the ignition switch,
My 99 Ody with 120K would suddenly switch off and come back while runing, Take it to dealer and report to Honda, Since out of warranty. The dealer would do the repairs estimated at $100 charge to you.

Posted on Apr 14, 2009

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SOURCE: Getting DTC code P0404 and P0420. What should I do?

The 420 will not go away with egr replacement. it means the computer has detected a problem with the catalytic converter. eGR valve is at the rear of the engine. Not easy to get to on vans.

Posted on May 06, 2009

  • 295 Answers

SOURCE: 1999 Honda Odyssey p0420 Error Code

Cat efficentcy. replace the converter.

Posted on Jul 07, 2009

MauiRentaCar
  • 288 Answers

SOURCE: Toyota Corolla DX 97 Engine Light EGR valve PLEASE HELP

You can try cleaning the EGR valve and passages with Seafoam. A bottle costs just a few dollars at any auto parts store or discount store. With the engine running, squirt/spray it in through the brake booster hose, or through the PCV hose. This will cause smoke to come out the exhaust. This is normal and will disappear after a few minutes. If Seafoam does not do the trick, then you can still disassemble the EGR valve from the throttle body and clean it with throttle body cleaner.

Frank
Frank's Friendly Cars Maui Car Rental
www.mauicarrental.biz

Posted on Sep 12, 2009

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Getting DTC code P0404 and P0420. What should I do?


The 420 will not go away with egr replacement. it means the computer has detected a problem with the catalytic converter. eGR valve is at the rear of the engine. Not easy to get to on vans.

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If this doe snot work, replace the mass air flow sensor, that is the unit the air filter tube connects to, it has a wire going to it.

Nov 26, 2008 | 2001 Honda Odyssey

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