01 Accord, 2.3L Automatic has P0172 ECU Code, need help - Honda-Tech - Honda Forum Discussion


Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

01 Accord, 2.3L Automatic has P0172 ECU Code, need help

Reply
 
 
 
Thread Tools Search this Thread
Old 07-28-2006, 04:05 PM   #1
Honda-Tech Member
Thread Starter
 
OE812's Avatar
 
Join Date: May 2005
Location: River Ridge, LA, USA
Posts: 6
Default 01 Accord, 2.3L Automatic has P0172 ECU Code, need help

I am interested in purchasing an 01 Accord but the scan tool indicated a P0172 Rich Bank 1 condition. The guide book indicated it could be a bad MAF sensor, injector, or fuel regulator. The car also exhibits a hard start condition. You have to press the gas pedal and on the third turn of the key, it starts.

What is the likely component causing these problems?

Thank you,
OE812 is offline   Reply With Quote
Old 07-29-2006, 01:44 PM   #2
Member
 
hondadude's Avatar
 
Join Date: Oct 2003
Location: Fayettenam, Ar, US
Posts: 3,703
Default Re: 01 Accord, 2.3L Automatic has P0172 ECU Code, need help (OE812)

how many miles are showing on this cream puff? What do the spark plugs look like? Fuel regulator check is pull off the vacum hose and see if there is gas in the hose. Fuel Pressure gauge is needed for an injector leak down test.
Turn the key on, wait for the fuel pump to build pressure 5 seconds, then crank the engine. See if that helps.
hondadude is offline   Reply With Quote
Old 07-30-2006, 04:18 AM   #3
Honda-Tech Member
 
Duane_in_Japan's Avatar
 
Join Date: Jun 2005
Location: Tachikawa Shi, Tokyo, Japan
Posts: 2,294
Default Re: 01 Accord, 2.3L Automatic has P0172 ECU Code, need help (hondadude)

The very first thing you need to do on a Honda with a P0172 is get a valve adjutment, do them cold, get the specs and follow through, be precise. Replace the valve cover gasket set also. I know you read it in the book but Hondas are MAP systems, not MAF, you can check the voltage against a chart at a certain RPM to see if it is good or bad.

Out of adjustment valves will lower the vacuum of the engine thus effecting the MAP voltage thus making the computer think the vacuum is lower making the computer think you are giving it the throttle or that you are cruising slowly down the road so the computer delivers more gas than needed and since the O2 sensor can keep up or it may show rich bias and setting the code, this is called a speed density system, it is showing speed at idle and it is rich due to this fact.
Duane_in_Japan is offline   Reply With Quote
Old 07-18-2011, 08:14 AM   #4
Honda-Tech Member
 
Join Date: Feb 2009
Location: HOUSTON
Posts: 56
Default Re: 01 Accord, 2.3L Automatic has P0172 ECU Code, need help

Did replacing MAP and fuel regulator work for you? I am told a bad cat converter could also be causing this just not sure. Both of my O2 sensor are new denso brand. So I know its not the O2 sensors. I'm just tring to see what worked for you.
houstonhulk is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2000 em1 p0172 code?? turbomrdeuce Honda Civic / Del Sol (1992 - 2000) 0 06-26-2016 04:37 PM
odyssey 2001, obdII codes mrrivee Odyssey | Ridgeline | MDX | Pilot | RDX | HR-V 1 07-04-2015 11:12 AM
2000 Accord Codes P0300-04 -1399 Hypochondriac Honda Accord (1990 - 2002) 7 02-21-2011 07:15 AM
1996 Accord 4 cyl Rear O2 Sensor? Throws P0172 Code johno8 Honda Accord (1990 - 2002) 0 06-25-2008 05:57 AM
P0172 Engine Code - What to check? bucky4444 Honda Civic / Del Sol (1992 - 2000) 4 03-23-2006 01:00 PM


Tags
0172, 02, 2001, 23, accord, acura, automatic, code, codes, element, engine, honda, key, maf, p0172, po172

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 10:13 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: