I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
How To Replace Catalytic Converters For P0420 And P0430 Error Codes ...
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
Possible Solutions Some suggested steps for troubleshooting a P0420 code include: * Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. * Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
Troubleshooting Toyota P0420 Code: Q&A For Land Cruiser Owners
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
[SOLVED] Toyota P0420 Code: Fast Fix For Toyota Catalyst Efficiency
CHEAP and EASY FIX of code PO420. Catalyst Efficiency below threshold Bank 1 (FJ Cruiser).
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
How To Replace Catalytic Converters For P0420 And P0430 Error Codes ...
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
So, I thought I'd share the little saga I've had with my FJC of late. Cliffnotes: I've been throwing P0420/P0430 (catalytic inefficiency right/left bank) codes since earlier this spring and now have to replace the exhaust manifolds. History: 06/06 build date, purchased 07/06. 122,000 on the ODO. Daily driver and weekend wheeler (more like bi-annually these days). Heavily armored, meticulously.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
CHEAP and EASY FIX of code PO420. Catalyst Efficiency below threshold Bank 1 (FJ Cruiser).
How To Replace Catalytic Converters For P0420 And P0430 Error Codes ...
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
Possible Solutions Some suggested steps for troubleshooting a P0420 code include: * Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. * Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform.
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
Toyota Tacoma Check Engine Light Code P0420 | Shelly Lighting
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
Does anyone know which 02 sensor to replace for code P0420/ Bank 1? Shortly before the code: I sea foamed the truck and swapped in a K&N filter. After getting code: I swapped the plugs to Denso Iridiums, cleaned the MAF, disconnected the battery, and CEL came up again. Any help/ pictures/.
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
Toyota Tacoma Check Engine Light Code P0420 | Shelly Lighting
So, I thought I'd share the little saga I've had with my FJC of late. Cliffnotes: I've been throwing P0420/P0430 (catalytic inefficiency right/left bank) codes since earlier this spring and now have to replace the exhaust manifolds. History: 06/06 build date, purchased 07/06. 122,000 on the ODO. Daily driver and weekend wheeler (more like bi-annually these days). Heavily armored, meticulously.
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
Dtc P0420 Toyota
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
CHEAP and EASY FIX of code PO420. Catalyst Efficiency below threshold Bank 1 (FJ Cruiser).
So, I thought I'd share the little saga I've had with my FJC of late. Cliffnotes: I've been throwing P0420/P0430 (catalytic inefficiency right/left bank) codes since earlier this spring and now have to replace the exhaust manifolds. History: 06/06 build date, purchased 07/06. 122,000 on the ODO. Daily driver and weekend wheeler (more like bi-annually these days). Heavily armored, meticulously.
How To Replace Catalytic Converters For P0420 And P0430 Error Codes ...
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
Check Engine Code P0420 Toyota
Possible Solutions Some suggested steps for troubleshooting a P0420 code include: * Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. * Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform.
So, I thought I'd share the little saga I've had with my FJC of late. Cliffnotes: I've been throwing P0420/P0430 (catalytic inefficiency right/left bank) codes since earlier this spring and now have to replace the exhaust manifolds. History: 06/06 build date, purchased 07/06. 122,000 on the ODO. Daily driver and weekend wheeler (more like bi-annually these days). Heavily armored, meticulously.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
How To Replace Catalytic Converters For P0420 And P0430 Error Codes ...
Possible Solutions Some suggested steps for troubleshooting a P0420 code include: * Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. * Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform.
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
CHEAP and EASY FIX of code PO420. Catalyst Efficiency below threshold Bank 1 (FJ Cruiser).
Code P0420 Bank 1: Which O2 Sensor Do I Replace? | Toyota FJ Cruiser Forum
I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
So, I thought I'd share the little saga I've had with my FJC of late. Cliffnotes: I've been throwing P0420/P0430 (catalytic inefficiency right/left bank) codes since earlier this spring and now have to replace the exhaust manifolds. History: 06/06 build date, purchased 07/06. 122,000 on the ODO. Daily driver and weekend wheeler (more like bi-annually these days). Heavily armored, meticulously.
Code P0420 Bank 1: Which O2 Sensor Do I Replace? | Toyota FJ Cruiser Forum
I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
Does anyone know which 02 sensor to replace for code P0420/ Bank 1? Shortly before the code: I sea foamed the truck and swapped in a K&N filter. After getting code: I swapped the plugs to Denso Iridiums, cleaned the MAF, disconnected the battery, and CEL came up again. Any help/ pictures/.
How To Replace Catalytic Converters For P0420 And P0430 Error Codes ...
Possible Solutions Some suggested steps for troubleshooting a P0420 code include: * Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. * Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform.
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
CHEAP and EASY FIX of code PO420. Catalyst Efficiency below threshold Bank 1 (FJ Cruiser).
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
Code P0420 Toyota
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
Does anyone know which 02 sensor to replace for code P0420/ Bank 1? Shortly before the code: I sea foamed the truck and swapped in a K&N filter. After getting code: I swapped the plugs to Denso Iridiums, cleaned the MAF, disconnected the battery, and CEL came up again. Any help/ pictures/.
Possible Solutions Some suggested steps for troubleshooting a P0420 code include: * Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. * Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform.
I have a CA spec Camry with 260K on the clock and just got the P0420 code. I tried the anti-fouler mod and still get the light so Im sure a new catalytic converter is needed. My question now is which catalytic converter do I replace to pass smog? The front alone or do I need to replace both.
Does anyone know which 02 sensor to replace for code P0420/ Bank 1? Shortly before the code: I sea foamed the truck and swapped in a K&N filter. After getting code: I swapped the plugs to Denso Iridiums, cleaned the MAF, disconnected the battery, and CEL came up again. Any help/ pictures/.
CHEAP and EASY FIX of code PO420. Catalyst Efficiency below threshold Bank 1 (FJ Cruiser).
Check engine light been coming off and on for a while. Also triggers the VSC TRACK & VCS OFF lights. Plugged it into an OBD2 scanner and got code P0420 (Catalyst Efficiency Below Threshold Bank 1). Is it my 02 sensors or Catalytic converter? My 2007 FJ runs normal with no problems.
P0420 code how did you guys fix it? Hello everyone I have a 2013 FJ Cruiser with 149,000 miles on it and I reside in California. The check engine light.
So, I thought I'd share the little saga I've had with my FJC of late. Cliffnotes: I've been throwing P0420/P0430 (catalytic inefficiency right/left bank) codes since earlier this spring and now have to replace the exhaust manifolds. History: 06/06 build date, purchased 07/06. 122,000 on the ODO. Daily driver and weekend wheeler (more like bi-annually these days). Heavily armored, meticulously.
My 2007 FJ is still throwing the P0420 code after changing the O 2 sensors and there is no loss of power, still drives like it did when I first got it. It has 211877 miles on it. No rattle from cat converter, no smell, and no noticeable exhaust leaks, runs smooth, had a coworker come and take.
Sorry guys, I know "not another P0420 post":rolleyes: To start with: 195,000 Miles P0420 Bank 2 (Driver) P0430 Bank 1 (Passenger) Scanner used OBD Link.
Contact me at jason [AT] cruiseryard dot com for the fastest response. New and used OEM parts for all 4x, 5x, 6x, 80, 100 and other Toyota/Lexus 4wd vehicles Stocking many Sankei 555 products. 1968 FJ40 "Leo" * 1970 FJ40 "Mushu" * 1989 FJ62 *1994 FZJ80 "Eeyore" * 2001 UZJ100 "Donkey".
![[SOLVED] Toyota P0420 Code: Fast Fix For Toyota Catalyst Efficiency](https://carmodnerd.com/wp-content/uploads/2025/06/toyota-p0420-error-code-error-fault-code-1024x538.jpg)
