TOOK INTO "AUTO ZONE" STORE AND WAS GIVEN THIS CODE. P1491 NO DTC DEF. FOUND
SOURCE: 2000 Honda Accord EGR Valve Error P0401
Jason,
-after you change the part you have to reset/clear the code
-this can be done by either:
(1) using the OBD2 code reader that Autozone used OR since option 2 (below) is very quick
(2) disconnecting the battery for about 30 seconds (this will delete
all codes/radio presets/etc) but it will also clear the 'check engine'
code
-this is what I do AFTER i write down my radio station presets :)
-hopefully the new EGR valve resolves your issue after you CLEAR the code
...but that code just means a an insufficient amount of Exhaust Gas
recirculation (pressure difference) used to keep the emissions in check
-if it comes back, then there are a few other fixes to try also
-let me know if you need further assistance
-please remember to rate me `fix-ya`if it works
thanks
SOURCE: 2000 Honda Accord Check Engine light on p0740
YOU HAVE A TORQUE CONVERTER PROBLEM. TORQUE CONVERTER CONTROL CIRCUIT MALFUNCTION CODES CAN COME FROM ELECTRICLE TO INTERNAL MALFUNCTION. IF YOU START EXPERIENCING A HARD SHIFT OR FREE SPIN TO HARD SHIFT DON'T BE SURPRISED. TRY CHANGING FLUID. THIS MAY HELP. HONDA WOULD HAVE REPLACED TRANS IF UNDER 105 k FOR FREE. IF YOU HAVE TO REPLACE TRANS. BUY ONE FROM HONDA, 3 YR WARRANTY AND AS CHEAP AS A REBUILT TRANS. HAVE A QUALIFIED PERSON INSTALL, YOU WILL SAVE ABOUT $500 DOING IT THIS WAY. GOOD LUCK
SOURCE: check engine light comes on and off, auto zone
The EGR valve helps your car more efficiently and completely burn fuel
by recirculating a portion of your exhaust and running it through the
combustion process again. When the EGR valve goes bad, it must be replaced.
The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum
controlled valve which allows a specific amount of your exhaust back
into the intake manifold. This exhaust mixes with the intake air and
actually cools the combustion process. Cooler is always better inside
your engine. The exhaust your EGR valve recirculates also prevents the
formation of Nitrogen related gases. These are referred to as NOX
emissions, and are a common cause for failing emissions testing.
Unfortunately, your EGR valve can get stuck, causing NOX gases to build
up. You'll know if your EGR valve is stuck or malfunctioning because
your car will experience symptoms like rough idle and bucking on
acceleration.
Here is a picture of where the EGR
Valve is located (Accord 1999). Replacing it is fairly simple and straightforward. A
vacuum line and a couple of bolts. You'll see what you have to do when
you look at it.
If you
are replacing the EGR Valve due to the Check Engine Light (MIL) being
on with a DTC P0401 then I suggest contacting your Honda Dealer. There
was a Product Update Campaign (PUD) in the fall of 1999 that corrected
the problem.
Another times, the clean is the solution...I hope help yoiu with this. Good luck, and remember rated this help.
Testimonial: "Thank you very much your knowledge and information you offered concerning my problem and following questions were VERY helpful!(I lost owners manual)"
SOURCE: I have a 20001 Odyssey with 70,000. The check
unfortunately it is. Contact your local dealership to see if it may still be covered under a warranty or not.
Customer Concern:
The check engine light is on with the trouble code P0740 present.
Tests/Procedures:
1. Test drive the vehicle and watch the tachometer. See if the automatic transmission locks up. If unable to see the RPM change, and the Engine Control Module (ECM) is turning on the lockup solenoids, then the problem has to be internal to the transmission. The transmission has an extended warranty from Honda for 7 years or 100,000 miles.
Potential Causes:
Automatic Transmission
Lock-Up Solenoid
Torque Converter
Tech Tips:
TSB #02-062
Diagnostic Codes:
P0740
SOURCE: 2002 Honda Accord V6 check engine light on- local
po505 idle air control if this is the code all hondas do it eventully, small problem easy fix u have 2 choices either remove the idle air control motor and clean the inside of it u will find it's black and the spring inside is stuck clean it with carb cleaner or gum cutter any parts store will have this it's a dirty job it will work for awhile but to replace it is recommended its not expensive for a new one which u can get at any autoparts store autozone,advanced,napa etc. there is only 2 bolts in most cases maybe 3 i doubt it though if u go online t google and type in th eyear make and model and engine size in ur case it's a 3.0 v6 and look for idle air control locations u'll find it to do this job a shop will charge u anywhere from 100.00 for diag to retrive the code plus the part and the labor so about 250.00-375.00 it will only take u honestly maybe 15 minutes to perform only tools needed are a 10 millimeter wrench there is only 1 connector to disconnect and ur done if u do this u will still have the check engine light because u have not cleared it from the computer to do this just disconnect the negative battery terminal (the black one or has a neg sign - don't disconnect the positive side +)for 5 minutes then reconnect and the computer will have reset no more light. good luck it really is that easy
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