I have a code showing PO430 catalyst system efficiency below threshold bank 2 on my 2003 Hyundai Tiburon GT V6. What code is that for? Is that for the O2 sensor?

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).

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

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
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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

• Defective Catalytic Converter
• Internal engine damage resulting in high oil consumption and/or a leaking Head Gasket has damaged the Catalytic Converter. P0430 OBD-II Trouble Code
  http://www.obd-codes.com/trouble_cod...old-bank-2.php
  
  the above site will explain in better detail. good-day !

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)

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

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

300 is multiple cylinder misfire, 420 is catilytic convertor no good and 446 is an evap problem

P0420 TW (Two-Way) Catalyst System, Bank 1
P0430 TW Catalyst System, Bank 2 . most likely a new catalytic converter.

Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

code po420=catalyst system efficiency below threshold bank #1
code po430=catalyst system efficiency below threshold bank #2
from autozone online
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a8b20