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Catalyst System Efficiency Below Threshold (Bank 2) I have codes po430 and kia sedona 2005

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Make sure the wiring on the back O2 sensors are good and tight.

Posted on Mar 07, 2015

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Posted on Jan 02, 2017

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SOURCE: P0420 Catalyst System Efficiency Below Threshold

have you tried to replace the 02 sensors, make sure to use penetrating lubricant when removing them, you may need to apply heat as well to get them to come out without stripping out.

Posted on Jul 13, 2009

  • 437 Answers

SOURCE: 03 kia spectra, what do I need to replace or fix,

this means you have a bad convertor one the side of cyclinders 123

Posted on Feb 09, 2011

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SOURCE: Kia Saxons 2005. Code PO 430. Catalystic

Replace the O2 Sensor and if that doesn't resolve the problem replace the Catalytic converter.

Posted on Feb 28, 2011

nicole99wu
  • 1049 Answers

SOURCE: code of PO174 1 system

hi,my friend, you can try,

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

Posted on Sep 15, 2011

airjer995
  • 5332 Answers

SOURCE: what does catalyst efficiency below threshold bank

it means the computer is seeing that the catalytic converter is no longer functioning within in threshold. Most often a new catalytic converter is the fix. The Federal emissions warranty in the U.S. is 8 years/80k miles. If you fall within this call your local Hyundai dealer to see what they will do for you.

If your out of the federal emissions warranty than you will likley be paying for this repair yourself. It is not cheap. Not all cats are the same. Replacing with an O.E. cat or a direct fit from a reputable aftermarket supplier will be your best bet. Anything else will usually not resolve the issue.

There are some other things that can cause this. Leaking exhaust and on rare occasion a bad downstream O2 sensor. A scan tool capable of reading live data is the best bet to properly diagnose what is actually going on.

Posted on Sep 30, 2011

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1 Answer

Where should i find this sensor P0342?


EXHAUST RELATED ERROR CODES

There are 711 possible PO generic DTC error codes. Only 7 of the 711 codes are exhaust related.

PO401: Insufficient EGR Flow

PO402: Exhaust Gas Recirculation (EGR) Excessive Flow Detected

PO410: Secondary Air Injection System Malfunction

PO420: Catalyst System Efficiency Below Threshold (Bank 1)

PO421: Warm-Up Catalyst Efficiency Below Threshold (Bank 1)

PO430: Catalyst System Efficiency Below Threshold (Bank 2)

PO431: Warm-Up Catalyst Efficiency Below Threshold (Bank 2)

THINGS TO ASK YOURSELF OR YOUR CUSTOMER

Have there been any driveability or performance issues with the vehicle, have there been any recent repairs or tune-up work performed, if so was the check engine light reset and were the codes recorded on previous repair orders.

Do not rely on scan tool data alone. In most applications, the customer will have the check engine light reset prior to repair. If the original cause of converter failure is intermittent, only the catalyst failure code may show up (masking the original reason for converter failure).

Nov 04, 2012 | Chevrolet Epica Cars & Trucks

1 Answer

What does a po430 code mean on a mercury cougar


EXHAUST RELATED ERROR CODES

There are 711 possible PO generic DTC error codes. Only 7 of the 711 codes are exhaust related.

PO401: Insufficient EGR Flow

PO402: Exhaust Gas Recirculation (EGR) Excessive Flow Detected

PO410: Secondary Air Injection System Malfunction

PO420: Catalyst System Efficiency Below Threshold (Bank 1)

PO421: Warm-Up Catalyst Efficiency Below Threshold (Bank 1)

PO430: Catalyst System Efficiency Below Threshold (Bank 2)

PO431: Warm-Up Catalyst Efficiency Below Threshold (Bank 2)

THINGS TO ASK YOURSELF OR YOUR CUSTOMER

Have there been any driveability or performance issues with the vehicle, have there been any recent repairs or tune-up work performed, if so was the check engine light reset and were the codes recorded on previous repair orders.

Do not rely on scan tool data alone. In most applications, the customer will have the check engine light reset prior to repair. If the original cause of converter failure is intermittent, only the catalyst failure code may show up

Nov 04, 2012 | Cars & Trucks

1 Answer

Code po430 came up


P0430 FORD - Catalyst System Efficiency Below Threshold Bank 2

Possible causes- Three way catalyst converter Bank 2 worn out
- Exhaust tube leaks
- Intake vacuum leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
-
-

Oct 08, 2012 | 1997 Ford Taurus

1 Answer

Po430 trouble code


P0430 - Catalyst System Efficiency Below Threshold Bank 2. The most common cause it the three way catalyst converter Bank 2. Common Problems That Trigger the P0430 Code

Feb 19, 2012 | 2005 Dodge Ram 1500

1 Answer

What do these codes mean ? po430 po420 po306 for mercury cougar 1999


P0430 code is(catalyst efficiency below threshold on bank 2)
P0420 code is((catalyst efficiency below threshold on bank 1)
P0306 code is(cylinder 6 misfire detected)

Dec 13, 2011 | 1999 Mercury Cougar

1 Answer

98 gmc sierra 1500 5.7 po430 code


Below is a general description of the problem. Check the following possibilities and we can go from there.


DTC

P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

Description
Indicates Bank 2 catalyst system efficiency is below the acceptable threshold.

Possible Causes
Use of leaded fuel
Damaged Oxygen Sensors
Malfunctioning ECT
High fuel pressure
Damaged exhaust manifold
Damaged catalytic converter
Oil contamination
Cylinder misfiring
Downstream Oxygen sensor wires improperly connected
Damaged exhaust system pipe
Damaged muffler /tailpipe assembly
******** spark timing

Dec 11, 2011 | 1999 GMC Sierra

1 Answer

Code of PO174 1 system too lean (bank 1) Code PO420 Catalyst efficiency below threshold (bank 1) Code PO430 Catalyst efficiency below threshold (bank 2)


hi,my friend, you can try,

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

Sep 14, 2011 | 2003 GMC Yukon XL

1 Answer

I have codes po430 and p2422 kia sedona


P0430 Catalyst System Efficiency Below Threshold (Bank 2)
P2422 Evaporative Emission System Vent Valve Stuck Closed

Jun 19, 2009 | 2005 Kia Sedona

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