P0420 and P0430 codes
#1
P0420 and P0430 codes
Hey Everyone:
I have a Accord that has 180,000 m on it and I've been getting the two P0430 and P0420 codes on it. 2 mechanics I took it to fell that that cat's the problem but I just want to get some other opinions before I invest in a new cat.
Thanks.
I have a Accord that has 180,000 m on it and I've been getting the two P0430 and P0420 codes on it. 2 mechanics I took it to fell that that cat's the problem but I just want to get some other opinions before I invest in a new cat.
Thanks.
#2
Usually the P0430 code is either the cat, or rear sensor. Not sure what the P0420 code is. What year is the car?
#3
P0420 is for the front bank catalytic converter, and P0430 is for the rear bank converter. Both are that the catalyst is below threshold. I'm guessing this is a V6 accord?
Are there any other codes, or previous work done on the car?
Is this constantly happening over several tanks of gasoline, or did the check engine light turn on after say filling up the gas, or any work done on the car?
Are there any other codes, or previous work done on the car?
Is this constantly happening over several tanks of gasoline, or did the check engine light turn on after say filling up the gas, or any work done on the car?
#4
P0420 is for the front bank catalytic converter, and P0430 is for the rear bank converter. Both are that the catalyst is below threshold. I'm guessing this is a V6 accord?
Are there any other codes, or previous work done on the car?
Is this constantly happening over several tanks of gasoline, or did the check engine light turn on after say filling up the gas, or any work done on the car?
Are there any other codes, or previous work done on the car?
Is this constantly happening over several tanks of gasoline, or did the check engine light turn on after say filling up the gas, or any work done on the car?
#6
The poor fuel economy is related to the P0420, as that's the upstream sensor (or fuel mix sensor).
#7
I wouldn't make the call on the upstream O2 sensor based on the current information. The next step would be to monitor the fuel trims to determine how the engine computer is adjusting the fuel to manage emissions.
#8
P0420 and P0430 are related to the separate primary catalytic converters. The 7th gen and 8th Accord V6 has 3 converters, the codes relate to the primary converters (bank 1 and bank 2) shown in the attached pic.
Each primary convertor has separate up stream air/fuel ratio sensor and downstream oxygen sensors; respectively. So, it is unlikely to be due to one sensor or the sensors. On these generation Hondas, it will most likely be due to bad cat converters.
Although not normal for both primary converters to be bad, it is possible. Does the car burn oil? If the car burns oil, etc., it may have caused both primary converters to become bad.
Each primary convertor has separate up stream air/fuel ratio sensor and downstream oxygen sensors; respectively. So, it is unlikely to be due to one sensor or the sensors. On these generation Hondas, it will most likely be due to bad cat converters.
Although not normal for both primary converters to be bad, it is possible. Does the car burn oil? If the car burns oil, etc., it may have caused both primary converters to become bad.