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Old 03-03-2010, 02:12 AM   #1
superdjl
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Default Got P0430 code on my 04 V6 SR5 T4R

Hi guys. My car has 168,000 on the clock and toyday I pulled a code from car and got P0430 (Bank 2 cat problem). Autozone guys suggest replacing O2 sensor after cat converter.

any suggestions or advices for the problem?

James /San Diego, CA
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Old 03-03-2010, 03:51 AM   #2
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I have P0420 which is left side. Looks like you have right side.
It can be O2 sensor, A/F sensor or cat itself fail as well as connector somewhere. I was suggested by 1 dealer to change O2 sensor, another suggested to go from other side and do a A/F sensor change first. My mechanic told e that similar problem on his Odyssey turned out to be full swap O2, A/F sensors and cat.

Double check when the light actually comes on. I mentioned that mine comes when its wet, so moisture is trigging it. I assume its either one of the sensors or falty connector somewhere.

P.S. I didn't change mine yet, still examining the issue. You can drive with it. If you have ScanGauge or any other tool, just clear the code and see when it apears next time. Keep truck of it. I'd not jump to replacing one component after another as it adds up quickly ($250 O2, $280 A/F, $450 Cat) + in my case I'd probably need new JBA headers to weld to new cat which is another $600 + labour.
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Old 03-03-2010, 10:19 AM   #3
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You can swap the O2 sensors side to side and see if you get a code for the other side, then you'll know if it's the sensor or not before spending $ on a new one.
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Old 03-03-2010, 03:16 PM   #4
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Quote:
Originally Posted by AlexJet View Post
I have P0420 which is left side. Looks like you have right side.
It can be O2 sensor, A/F sensor or cat itself fail as well as connector somewhere. I was suggested by 1 dealer to change O2 sensor, another suggested to go from other side and do a A/F sensor change first. My mechanic told e that similar problem on his Odyssey turned out to be full swap O2, A/F sensors and cat.

Double check when the light actually comes on. I mentioned that mine comes when its wet, so moisture is trigging it. I assume its either one of the sensors or falty connector somewhere.

P.S. I didn't change mine yet, still examining the issue. You can drive with it. If you have ScanGauge or any other tool, just clear the code and see when it apears next time. Keep truck of it. I'd not jump to replacing one component after another as it adds up quickly ($250 O2, $280 A/F, $450 Cat) + in my case I'd probably need new JBA headers to weld to new cat which is another $600 + labour.
Thanks for your input first. Left side of the car, do u mean passenger side of your car (Bank1)?

I used ODBII scan tool to read live data (voltage) and found Bank1 S1 and Bank2 S1 are in good condition. However, the data (voltage) of bank 1 S2 and bank2 S2 (after cat converter) are fluctuating. Especially, bank 2 S2 fluctuating slower than bank1 S2.

Any suggestions?

Thanks

Last edited by superdjl; 03-03-2010 at 03:31 PM.
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Old 03-03-2010, 03:31 PM   #5
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Default O2 sensors and CAT converter (P0430)

Quote:
Originally Posted by Mikestang View Post
You can swap the O2 sensors side to side and see if you get a code for the other side, then you'll know if it's the sensor or not before spending $ on a new one.
Thanks for your reply. I am thinking the same thing. I used my scan tool today to read live data and found bank1 S2 and bank2 S2 are acting funny. I am going to replace them first. Although bad cat converters could affect output of O2 sensors, but it is the first cheaper option to go with. In addition to that, my O2 sensors are due for replacement (I have 168000 miles on my clock).


Thanks again.
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Old 03-03-2010, 06:14 PM   #6
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A little tip on removing the O2's... use brake fluid to lube it first and wait at least ten minutes or so. Yes brake fluid. Especially with it having 168000. Also if you are seeing a fluxuation in both O2's and only recieving an error on bank2 (bank1 is the drivers side and bank 2 is the passengers side) it may not be the O2. Also have you done any mods with the exhuast?
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Old 03-03-2010, 09:37 PM   #7
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If you use brake fluid (or anything not sensor safe) be sure to clean it all up before you put new sensors in. Would be a shame to ruin a brand new sensor.
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Old 03-04-2010, 01:49 AM   #8
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Default Where is the Cat converter?

I am confused big time. Where is the cat converter? Is the cat convert attached with exhaust manifold?



=_=
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File Type: jpg ENGINE.jpg (1.69 MB, 90 views)
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Old 03-04-2010, 03:42 AM   #9
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Quote:
Originally Posted by superdjl View Post
Thanks for your input first. Left side of the car, do u mean passenger side of your car (Bank1)?

I used ODBII scan tool to read live data (voltage) and found Bank1 S1 and Bank2 S1 are in good condition. However, the data (voltage) of bank 1 S2 and bank2 S2 (after cat converter) are fluctuating. Especially, bank 2 S2 fluctuating slower than bank1 S2.

Any suggestions?

Thanks
As of my understanding Bank 1 (P0420) is Left (driver) side.
I have a code, but voltage from both left and right sensors is fluctuating and it looks normal to me. I was told that A/F sensors (before the cat) should read constant voltage, but equipment I used can't read those sensors and I don't want to pay $150 to dealership for testing.
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Old 03-04-2010, 03:44 AM   #10
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Quote:
Originally Posted by Mikestang View Post
You can swap the O2 sensors side to side and see if you get a code for the other side, then you'll know if it's the sensor or not before spending $ on a new one.
Quote:
Originally Posted by superdjl View Post
Thanks for your reply. I am thinking the same thing. I used my scan tool today to read live data and found bank1 S2 and bank2 S2 are acting funny. I am going to replace them first. Although bad cat converters could affect output of O2 sensors, but it is the first cheaper option to go with. In addition to that, my O2 sensors are due for replacement (I have 168000 miles on my clock).


Thanks again.
I was reading URD website and they've mentioned that Toyota used different sensor part numbers for O2 sensors on our trucks till '07. It may mean that they can not be interchangeble...
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Old 03-04-2010, 03:48 AM   #11
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Quote:
Originally Posted by superdjl View Post
I am confused big time. Where is the cat converter? Is the cat convert attached with exhaust manifold?



=_=
Pre-Cat is on exhaust manifold, Aft-Cat on Exhaust pipe. You can see them on the picture.
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Old 03-04-2010, 11:53 AM   #12
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Default TSB 034-07 O2 sensors' locations

Quote:
Originally Posted by AlexJet View Post
As of my understanding Bank 1 (P0420) is Left (driver) side.
I have a code, but voltage from both left and right sensors is fluctuating and it looks normal to me. I was told that A/F sensors (before the cat) should read constant voltage, but equipment I used can't read those sensors and I don't want to pay $150 to dealership for testing.
I found a Toyota TSB pdf file from other website. It shows locations of bank1 and bank2. I might have misinterpreted. I think bank 2 is on the passenger side. V6 engine is 1GR-FE (correct me if I am wrong).

as for sensors fluctuation, I found one of o2 sensors fluctuating slower than the other. Any suggestion on my observation of O2 sensors?

I know my Bank1, 2 S1 and S2 (one b4 cat converter) sensors are fluctuating as car revving in different RPMs. Isn't that normal?

150 dollars for AF ratio sensors diagnostic ?? that's too much. I wouldn't pay that to stealership. It's more like a robbery to me.


Thanks for your reply again.
Attached Files
File Type: pdf 2008-07-20_224325_sensor_identification.pdf (75.6 KB, 83 views)

Last edited by superdjl; 03-04-2010 at 12:04 PM.
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Old 03-04-2010, 11:58 AM   #13
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Default O2 sensors interchangeability

Quote:
Originally Posted by AlexJet View Post
I was reading URD website and they've mentioned that Toyota used different sensor part numbers for O2 sensors on our trucks till '07. It may mean that they can not be interchangeble...

Thanks for the information and good for other forum users to know too.
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Old 03-04-2010, 01:30 PM   #14
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FJ Cruiser:

2009 V6 - 4.0 Front = 234-9026
2009 V6 - 4.0 Rear = 234-4260

2008 V6 - 4.0 Front = 234-9051
2008 V6 - 4.0 Rear = 234-4260

2007 V6 - 4.0 Front = 234-9051
2007 V6 - 4.0 Rear = 234-4260

V6 4Runners:

2009 V6 - 4.0 Rear = 234-4260

2008 V6 - 4.0 Rear = 234-4260

2007 V6 - 4.0 Front = 234-9051
2007 V6 - 4.0 Rear = 234-4260

2006 V6 - 4.0 Front = 234-9051
2006 V6 - 4.0 Rear Left = 234-4261
2006 V6 - 4.0 Rear Right = 234-4260

2005 V6 - 4.0 Front = 234-9051
2005 V6 - 4.0 Rear Left = 234-4261
2005 V6 - 4.0 Rear Right = 234-4260

2004 V6 - 4.0 Front = 234-9055
2004 V6 - 4.0 Rear Left = 234-4804
2004 V6 - 4.0 Rear Right = 234-4805

2003 V6 - 4.0 Front = 234-9055
2003 V6 - 4.0 Rear Left = 234-4804
2003 V6 - 4.0 Rear Right = 234-4805

2001 & 2002 4WD & 2WD V6; Front: 234-9002, Rear: 234-4622

2000 Cali 4WD manual V6; Front: 234-9001, Rear: 234-4153
2000 Cali 2WD manual V6; Front: 234-9001, Rear: 234-4155

1999 & 2000 Cali auto, 2WD/4WD V6; Front: 234-9002
1999 & 2000 Cali auto, 2WD V6; Rear: 234-4155
1999 & 2000 Cali auto, 4WD V6; Rear: 234-4153

1999 California manual V6 2WD/4WD 4Runner; Front = 234-9003
1999 California manual V6 4Runner; 2WD Rear = 234-4155
1999 California manual V6 4Runner; 4WD Rear = 234-4153

1999 & 2000 49 State 2WD & 4WD auto V6; Front = 234-4162
1999 & 2000 49 State 2WD & 4WD auto V6; Rear = 234-4162
1999 & 2000 49 State manual V6 2WD; Front: 234-4162
1999 & 2000 49 State manual V6 4WD; Front: 234-4161
1999 & 2000 49 State manual V6 2WD & 4WD; Rear: 234-4154


1996-1998 4WD manual V6-3.4; Front = 234-4161
1996-1998 4WD manual; Rear = 234-4154

1998 2WD ALL Front = 234-4162; Rear 234-4154

1996-1998 Auto 4WD V6 3.4; Front = 234-4162
1996-1998 Auto 4WD V6 3.4; Rear = 234-4154

1997 Auto 2WD; V6 3.4 Front = 234-4162, Rear = 234-4153
1997 Manual 2WD; V6 3.4 Front = 234-4161, Rear = 234-4153

1996 All 2WD; V6 3.4 Front = 234-4162
1996 All 2WD; V6-3.4 Rear = 234-4153

2.7 & 2.4 V6 4Runners:

2000 California manual L4-2.7; Front = 234-9001
2000 California manual L4-2.7; Rear = 234-4622

1999 & 2000 California auto 2WD/4WD L4-2.7; Front = 234-9002
1999 & 2000 California auto 2WD L4-2.7; Rear = 234-4622
1999 & 2000 California auto 4WD L4-2.7; Rear = 234-4154

1999 California manual L4-2.7; Front = 234-9003
1999 California manual L4-2.7; Rear = 234-4622

1999 & 2000 49 State 2WD/4WD L4-2.7; Front = 234-4162
1999 & 2000 49 State 4WD L4-2.7; Rear = 234-4154
1999 & 2000 49 State 2WD L4-2.7; Rear = 234-4162

1998 2WD L4-2.7; Both Front & Rear: 234-4162

1996-1997 All 4WD & 2WD L4-2.7; Front = 234-4162
1996-1997 All 4WD L4-2.7; Rear = 234-4154
1996-1997 All 2WD L4-2.7; Rear = 234-4153

1995 L4-2.4 California Front: 234-4151
1994 L4-2.4 California Front: 234-4072

Tacomas:

2009 V6 - 4.0 Rear = 234-4260

2008 V6 - 4.0 Rear = 234-4260

2007 V6 - 4.0 Rear = 234-4260
2007 V6 - 4.0 Front = 234-9051

2006 V6 - 4.0 Front = 234-9051
2006 V6 - 4.0 Rear = 234-4260

2005 V6 - 4.0 Front = 234-9051
2005 V6 - 4.0 Rear = 234-4260

2004 V6 - 3.4 Auto Front = 234-9001
2004 V6 - 3.4 Manual Front = 234-9003

2004 V6 - 3.4 Rear = 234-4189

2003 V6 - 3.4 Auto Front = 234-9001
2003 V6 - 3.4 Manual Front = 234-9003
2003 V6 - 3.4 Rear = 234-4189

2002 V6-3.4 Auto; Front = 234-9001

2003 V6-3.4 Auto; Front = 234-9001
2003 V6-3.4 Manual; Front = 234-9003
2003 L4-2.4 Auto; Front = 234-9002
2003 L4-2.4 Manual; Front = 234-9001
2003 L4-2.7 All; Front = 234-9001

2002 V6-3.4 Manual; Front = 234-9003
2002 V6- 3.4 Auto; Front = 234-9001
2002 V6- 3.4 Rear = 234-4189
2002 L4-2.7 2WD; Front - 234-9001
2002 L4-2.4 Manual; Front = 234-9001
2002 L4-2.4 Auto; Front = 234-9002

2001 V6-3.4 California Auto = 234-9001
2001 V6-3.4 California Manual, Front = 234-9003
2001 V6-3.4 Rear = 234-4189
2001 L4-2.4 Auto; Front = 234-9002
2001 L4-2.4 Manual; Front = 234-9001
2001 L4-2.7 4WD Auto; Front = 234-9001
2001 L4-2.7 4WD Manual; Front = 234-9002
2001 L4-2.7 2WD Manual/Auto = 234-9001

1999/2000 V6-3.4 49 State 2WD (not Prerunner); Front = 234-4162
1999/2000 V6-3.4 49 State 2WD (not Prerunner); Rear = 234-4159
1999/2000 V6-3.4 49 State 2WD (Prerunner); Front = 234-4162
1999/2000 V6-3.4 49 State 2WD (Prerunner); Rear = 234-4153
1999/2000 V6-3.4 49 State 4WD Automatic; Front = 234-4161
1999/2000 V6-3.4 49 State 4WD Automatic; Rear = 234-4162
1999/2000 V6-3.4 49 State 4WD Manual; Front = 234-4161
1999/2000 V6-3.4 49 State 4WD Manual; Rear = 234-4154

2000 L4-2.4 49 State Automatic; Front = 234-4154
2000 L4-2.4 49 State Automatic; Rear = 234-4189
2000 L4-2.4 49 State Manual; Front = 234-4154
2000 L4-2.4 49 State Manual; Rear = 234-4189
2000 L4-2.7 49 State 2WD; Front = 234-4162
2000 L4-2.7 49 State 2WD; Front = 234-4159
2000 L4-2.7 49 State 4WD Automatic; Front = 234-4162
2000 L4-2.7 49 State 4WD Automatic; Front = 234-4153
2000 L4-2.7 49 State 4WD Manual; Front = 234-4162
2000 L4-2.7 49 State 4WD Manual; Front = 234-4162
2000 L4-2.7 California; Front = auto 234-9001
2000 L4-2.7 California; Front = manual 234-9002
2000 L4-2.7 California; Rear = 234-4189
2000 V6-3.4 California Automatic; Front = 234-9001
2000 V6-3.4 California Automatic; Rear = 234-4189
2000 V6-3.4 California Manual; Front = 234-9003
2000 V6-3.4 California Manual; Rear = 234-4189

1999-1998 L4-2.7 2WD; Front = 234-4162
1999-1998 L4-2.7 2WD; Rear = 234-4159

1999-1995 L4-2.4 Auto; Front = 234-4154
1999-1995 L4-2.4 Auto; Rear = 234-4153
1999-1995 L4-2.4 Manual; Front = 2334-4162
1999-1995 L4-2.4 Manual; Rear = 2334-4153

1999 L4-2.7; Front = 234-4162
1999 L4-2.7; Rear = 234-4153
1999 V6-3.4 2WD California; Front = 234-4162
1999 V6-3.4 2WD California; Rear = 234-4189
1999 V6-3.4 4WD California; Front = 234-4153
1999 V6-3.4 4WD California; Rear = 234-4189

1998-1995 L4-2.7; Front = 234-4162
1998-1995 L4-2.7; Rear = 234-4162
1998-1995 V6-3.4 2WD; Front = 234-4153
1998-1995 V6-3.4 2WD; Rear = 234-4153
1998-1995 V6-3.4 4WD; Front = 234-4161
1998-1995 V6-3.4 4WD; Rear = 234-4154
1998-1995 V6-3.4 Automatic; Front = 234-4162
1998-1995 V6-3.4 Automatic; Rear = 234-4162

1995 L4-2.7 Manual; Front = 234-4162
1995 L4-2.7 Manual; Rear = 234-4162
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Last edited by AlexJet; 03-04-2010 at 01:35 PM.
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Old 03-04-2010, 01:38 PM   #15
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Quote:
Originally Posted by superdjl View Post
I found a Toyota TSB pdf file from other website. It shows locations of bank1 and bank2. I might have misinterpreted. I think bank 2 is on the passenger side. V6 engine is 1GR-FE (correct me if I am wrong).

as for sensors fluctuation, I found one of o2 sensors fluctuating slower than the other. Any suggestion on my observation of O2 sensors?

I know my Bank1, 2 S1 and S2 (one b4 cat converter) sensors are fluctuating as car revving in different RPMs. Isn't that normal?

150 dollars for AF ratio sensors diagnostic ?? that's too much. I wouldn't pay that to stealership. It's more like a robbery to me.


Thanks for your reply again.

Based on that TSB on 1GR-FE Bank 1 is Passenger side.
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Old 03-05-2010, 12:40 PM   #16
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Default Serious in doubt

P0430 code has been bothering me for a while now. For some reason, I feel there is nothing wrong with my O2s, A/Fs and cat converters. Moreover, I checked leaks on exhaust system and did not any visible leaks. are there any other possible way to trigger P0430 code?


Thanks.

Thanks to user Alexjet for all replies made in this particular topic.
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Old 03-05-2010, 01:05 PM   #17
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Quote:
Originally Posted by superdjl View Post
PI feel there is nothing wrong with my O2s
Why do you feel this way? Obviously something is wrong or the code wouldn't be thrown. Easiest thing to check is the sensor, so start there with a sensor swap.
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Old 03-05-2010, 02:38 PM   #18
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Default Sensors Voltages

Quote:
Originally Posted by Mikestang View Post
Why do you feel this way? Obviously something is wrong or the code wouldn't be thrown. Easiest thing to check is the sensor, so start there with a sensor swap.
Well, I said that because based on my ODBII scanner, it shows O2 sensors are working (voltages are fluctuating ) A/F sensors are changing in voltages between 3.000 >=3.999 volt
O2 sensors are changing between V. 0 >=0.999

The only uncertainty is the catalytic converters. It's a scary problem to face.
So by dodging the problem, I assume there is nothing wrong with Bank2 emission system.


=_=

Last edited by superdjl; 03-05-2010 at 02:42 PM.
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Old 03-05-2010, 02:52 PM   #19
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I sounds like you have a cat going bad. First I would disconnect the battery for at least 30 minutes or so and then see how long it takes for the code to reappear.... if it does at all
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Old 03-05-2010, 03:06 PM   #20
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If its not a cat it may be your vvti solenoid going bad. You have two of these solenoids and they control the timing on each cam. If one goes bad your engine may run rich. This can cause emission error codes to pop up. It is extremely easy to test these solenoids too. Just pull it off and and apply a 12v source and the plunger should continuously fluxuate. On the v6 the solenoids are located right above the valve covers towards the front of the engine.
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