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P0430 code for 1997 ls400

Engine check lite is on with the code P0430

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6ya6ya
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Posted on Jan 02, 2017

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bschilz
  • 2049 Answers

SOURCE: check engine light-on OBD code's P0420 &

The codes are Catalyst System Efficiency Below Threshold (Bank 1)&(Bank 2).

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

A code P0420 may mean that one or more of the following has happened:

  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Retarded spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
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. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2), replace if necessary
  • Replace the catalytic converter
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem.

Posted on Oct 06, 2009

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SOURCE: check engine lite,code p0430 for a 2005 toyota

Hello. Your P-0420-code is most likely due to a bad Air-Fuel sensor; Bank one, Sensor one. This sensor is on the exhaust manifold, closest to the firewall.

We would recommend replacing this sensor.

Note: Please use a genuine Toyota sensor; the aftermarket sensors do not deliver the correct voltage to the computer. If you purchase an aftermarket sensor, your problem will not be corrected; we see this quite often in our service department.

We hope that this helps you out.-

Posted on Dec 30, 2009

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03chevy
  • 79 Answers

SOURCE: p0430

P0430 Catalyst System Efficiency Below Threshold (Bank 2)

P0441 Evaporative Emission Control System Incorrect Purge Flow
with p0441 did you replace the gas cap on all the way? that will cause this code every time. and or have you ever replaced the gas cap?

Posted on Apr 15, 2010

  • 5 Answers

SOURCE: i have a check engine light that comes on sometime...

possibly the Catalyst System Efficiency Below Threshold.

Posted on Jun 14, 2010

  • 869 Answers

SOURCE: check engine light ---- checked

check for exhaust leaks on ur tucson.

Posted on Mar 21, 2011

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1 Answer

I want to know what a code P0430 means?


Your catalytic converter is not operating efficiently. Replace it and the code will go away.

Jul 24, 2016 | Cars & Trucks

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Check engine light on engine miss replaced o2 sensors code 430 no exaust leaks flashed the system still missing wrench says maybe EGR valve at a cost of 400. installed but may not work ?????


You say you have a P0430 code ?
P0430 - Catalyst System Efficiency Below Threshold Bank 2

Read more: http://www.autocodes.com/p0430.html#ixzz45zcgchOf
You need a catalytic converter ,no EGR problem . Suggest you take your vehicle to a ASE certified repair shop . You had or have a misfire , this wrecked you catalytic converter !

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Car sometimes will not start after sits for a day


Definition of Diagnostic Trouble Code P0420 Category: Powertrain Definition: Catalyst System Efficiency Below Threshold Bank 1Note: This definition of P0420 is applied to all manufacturers

Definition of Diagnostic Trouble Code P0430 Category: Powertrain Definition: Catalyst System Efficiency Below Threshold Bank 2Note: This definition of P0430 is applied to all manufacturers

As the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0430 code is combined with other codes, try fixing the other codes first.

Jul 11, 2015 | 2006 Toyota Solara

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P0430 2005 tuscon


Check out related help links to troubleshoot these common error OBD code noticed on many brand vehicles:------
1998 GMC K1500: OBD Error Code P0430? http://schematicsdiagram.blogspot.in/2012/06/1998-gmc-k1500-obd-error-code-p0430.html

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OBD code P0301, P0430 and P0174? http://schematicsdiagram.blogspot.in/2012/02/obd-code-p0301p0430-and-p0174.html

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These will help.
Thanks.

Nov 23, 2012 | Cars & Trucks

1 Answer

P0430 code on bank 2 04 BMW 745li


It goes by the firing order of the engine .. Find which piston fires 2nd and that side of the engine is bank 2.

Feb 04, 2012 | BMW Cars & Trucks

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2006 Ford F150, 4x4, Triton V8, 5.4L-loses power going uphill between 50-60mph. Check engine light code of P0430. This indicates exhaust system. Where to start?


code P0420 & P0430 usually indicates a problem with catalitic coverter restriced/clogged
a muffler shop can run a test to check this .a misfire in engine can also be a culprit of coverter
going bad because of unburned fuel going through exhaust system

good luck

Jun 19, 2011 | Ford F-150 Cars & Trucks

1 Answer

Check engine lite,code p0430 for a 2005 toyota sienna


Hello. Your P-0420-code is most likely due to a bad Air-Fuel sensor; Bank one, Sensor one. This sensor is on the exhaust manifold, closest to the firewall.

We would recommend replacing this sensor.

Note: Please use a genuine Toyota sensor; the aftermarket sensors do not deliver the correct voltage to the computer. If you purchase an aftermarket sensor, your problem will not be corrected; we see this quite often in our service department.

We hope that this helps you out.-

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1 Answer

Ck. Engine P0420 & P0430


engine code p0430 for 2005 toyota sienna

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