Honda Odyssey Forum banner

1 - 15 of 15 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter · #1 ·
Engine light came on, my friend scanned the code, the code is p0430, catalytic converter bank 2. The car is out of warranty, do i really need a new converter ? Which side is bank 2 ?
 

·
Registered
Joined
·
1 Posts
Rev Garage. I had the same thing happen with my 05 at only 75k. If you are under 150,000km Honda will cover the catalytic converters. They are covered under a different warranty. If its the backside look forward to a full day to take it out and replace.
 

·
Registered
Joined
·
72 Posts
Try running a higher grade of fuel if you don't already. Mine has thrown this code several times on and off, I can usually make it go off by running a tank of 93 through it. It will also most likely go off once the weather gets warmer. The o2 sensor on this car are extremely sensitive. If you can get the dealer to cover it under warranty I would do that sooner than later. Wait til you find out how much the convertor is. Could also be the 02 sensor as well.
 

·
Registered
Joined
·
67 Posts
one of the first notes in the shop manual say that it could be caused by poor fuel quality. You might try using up this tank, clearing the code and see if it comes back. The other item is the replacement of the front WU-TWC. Like a cat converter.
 

·
Registered
Joined
·
884 Posts
Google the code number and you can get a lot of info. If you actually get into replacing a catylytic convertor, if that is actually the problem, it can get expensive although there are aftermarket convertors out thaere that cost a fraction of the Honda part. I was fortunate in that I was still under warranty and you wnat to check that out and rattle a few sabres if they tell you its not covered.
 

·
Registered
Joined
·
235 Posts
P0141, P0161: Secondary HO2S (Sensor 2) Heater


  • Poor quality fuel can cause these DTCs.
  • Information marked with an asterisk (*) applies to the front bank (Bank 2).

  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  4. Test-drive under these conditions:

    • Engine coolant temperature above 158 °F (70 °C)
    • A/T in D position
    • Vehicle speed between 45 mph (72 km/h ) and 75 mph (120 km/h ) for 5 minutes or more with cruise control set
    • Maintain the vehicle speed at 55 mph (88 km/h ) for 5 minutes or more with cruise control set

  1. Monitor the OBD STATUS for DTC P0420 and/or P0430* in the DTCs MENU with the HDS. Does the screen indicate EXECUTING? YES - Go to step 6. NO - Go to step 4 and recheck.
  2. Continue test driving until a result comes on.
  3. Monitor the OBD STATUS for DTC P0420 and/or P0430* in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to step 8. NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 4 and recheck.
  4. Turn the ignition switch OFF.
  5. Replace the WU-TWC.
  6. Turn the ignition switch ON (II).
  7. Reset the PCM with the HDS.
  8. Do the PCM idle learn procedure.
  9. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  10. Test-drive for about 10 minutes , continually changing the vehicle speed.
  11. Check the CATA MON TEMP in the DATA LIST with the HDS. Is the temperature OK? YES - Go to step 16. NO - Go to step 13 and recheck.
  12. Test-drive under these conditions:

    • Engine coolant temperature above 158 °F (70 °C)
    • A/T in D position
    • Maintain the vehicle speed at 55 mph (88 km/h ) for 5 minutes or more with cruise control set

  1. Monitor the OBD STATUS for DTC P0420 and/or P0430* in the DTCs MENU with the HDS. Does the screen indicate EXECUTING? YES - Go to step 18. NO - Go to step 16 and recheck.
  2. Continue test driving until a result comes on.
  3. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - Go to the indicated DTC's troubleshooting. NO - Go to step 20.
  4. Monitor the OBD STATUS for DTC P0420 and/or P0430* in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check the fuel quality. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 13 and recheck.
 

·
Registered
Joined
·
176 Posts
Emission warranty is longer than std warranty. (most are 100miles) but not positive

I'd recommend clear code, change to premuim fuel and try. Cat efficency codes are set by a computer caculation of the sensor before and after the converter ASSUMING both sensors are working proper. A lazy sensor can set false efficency codes. The computer is looking for a change in the Exhaust as it checks it before and after going thru converter. so until diagnosed its not 100% converter.
 

·
Registered
Joined
·
22 Posts
P0420 2001 odyssey

I bought my van at 89000 miles and when I got to 150000 I had code p0420 just like what everyone here is talking about. The code had been ON and OFF, some 10k-15k, some a few thousand miles. Now it has 222220 miles still with the original engine and transmission. I cruised across country 9 times up and down. Still running like a charm. I feel bad for those who chose to change their tranny 'cause of the code. ITS THE FUEL. Oh I only use premium grade. I change the oil every 3k miles, forget what the book says, 5k, 6k, 7k or whatever. I change tranny fluid 20k-30k miles. Here is the thing, whatever codes you have just don't freaked out.
 

·
Registered
Joined
·
167 Posts
Pretty sure it's second o2 sensor. After firewall side cat converter. Best to put spark plug non fauler or some spacer to move 02 sensor away from high reading. Honda has 3 cat converters.. thare too much. U will pass inspection just fine
 

·
Registered
Joined
·
167 Posts
you have 2001 odyssey? then it's the o2 sensor after or in the mid section of your cat converter in the middle of the car. 2001 does not have pre cats. only one converter on 2001 odys.
same thing. just put a spark plug non fauler. rear o2 sensor is not important. only the front is important
 

·
Registered
Joined
·
5 Posts
Engine light came on, my friend scanned the code, the code is p0430, catalytic converter bank 2. The car is out of warranty, do i really need a new converter ? Which side is bank 2 ?
I tried using a fuel additive, as some had suggested. But that did not work for me. So I replaced the O2 sensors and the code went away. As many have said, the emissions settings are sensitive, so it might have gone away by itself. The minimum allowable threshold for cat efficiency is quite high. But my wife does not want to see any warning lights, so I took action.

A word of advice: never top-off your Odyssey tank when you are filling it with gas, as that can result in a false code related to the evaporative emissions system (canister leak, etc.). I chased that one for a while before finding out that my wife liked round dollar numbers on the gas pump, so she would continue beyond the click. Do not top-off and make sure that you hear at least several clicks when you tighten the gas cap afterwards!
 

·
Registered
Joined
·
5 Posts
My 2005 Odyssey (231K) just threw a P0430 after being out of service for a few weeks (front end damage from a parking lot incident) and after filling up the tank. After adding a shot of Lucas fuel treatment (just in case bad gas) and taking a 3.5 hour trip to Austin and back the following day, the check engine light cleared. It probably would have cleared without the Lucas fuel additive, but I use it every few months, anyway.

if the code had not cleared, then I would likely have taken a look at the O2 sensors next. The upstream tends to go bad first, in my experience.

i have worked on cars for over four decades, and I will freely admit that I like many things about modern cars - electronic ignition, fuel injection, long-life spark plugs, disk brakes and ceramic pads, ODB-II, etc. But there are also a lot of unnecessary “extras” on modern cars that require motors, valves, sensors, vacuum lines, etc., that are doomed to fail at some point.

Dumping the carb and distributor was great. But I wish that I could simplify some of the rest.
 

·
Registered
Joined
·
5 Posts
P0420 2001 odyssey

I bought my van at 89000 miles and when I got to 150000 I had code p0420 just like what everyone here is talking about. The code had been ON and OFF, some 10k-15k, some a few thousand miles. Now it has 222220 miles still with the original engine and transmission.
I have done my best to maintain our 2005 Odyssey and it has been very good to us, overall. But components wear over time and no vehicle is perfect. We were cruising west on I-10 at 80 mph with about 215K on the odometer when the transmission suddenly dropped down from overdrive (5th) to 3rd. What a jolt as the engine revved up! Then it went back to 5th after a few seconds, dropped again and repeated as my wife slowed down and sought an exit. Had to rebuild the transmission at a cost of around $2500, but the van is in good shape and will last a lot longer.

My best advice is to use full synthetic oil and regular change intervals. The engine still runs as smooth as it did new. Other good advice - take care of the rest of the fluids per schedule - flush and bleed brakes at least every two years, replace coolant, transmission fluid. If you have an AWD Honda, then change that dual pump II oil in the transaxle, too, or you will regret it.
 

·
Registered
Joined
·
5 Posts
My 2005 Odyssey (231K) just threw a P0430 after being out of service for a few weeks (front end damage from a parking lot incident) and after filling up the tank. After adding a shot of Lucas fuel treatment (just in case bad gas) and taking a 3.5 hour trip to Austin and back the following day, the check engine light cleared. It probably would have cleared without the Lucas fuel additive, but I use it every few months, anyway.
I have noticed that the P0430 code kicks on after I have disconnected the battery to work on the van. In that case it goes away on its own after a few days to a week, depending on your driving habits. This time, I have to replace the starter. The light popped on after a while, then it went away on its own after a few days without taking any action. I had replaced both pairs of O2 sensors just a year ago (upstream and downstream, banks 1 & 2) and I wasn’t aware of any other maintenance issues, such as a vacuum leak, that might throw that code. So I chose to wait and this time patience paid off on that somewhat finicky system.
 
1 - 15 of 15 Posts
Top