P0430 - CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 2)

The P0430 OBD2 DTC Code is a generic code that indicates that there is a malfunction within the TWC system (Three Way Catalyst).

This code is set when the ECU (Motor Control Unit) detects a performance that is below the level of the TWC (3-way catalytic converter).

• Check Engine light is on.
• When codes related to the Catalytic Converter are established, the Check Engine light is intermittent.
• In idle or cold it is hard.
• The motor may lose power.

The reasons why the fault code P0430 OBD II can be established can be:

• There may be engine misfire.
• There may be escape leaks.
• An Oxygen Sensor (O2) may be having incorrect readings.
• The TWC (Three Way Catalyst) may be defective.

The steps to solve the code P0430 are:

• In case there is a misfire, you should proceed to make the correct diagnosis and repairs.
• Make sure the exhaust pipe has no defects, repair any damage.
• You can verify that the fuel injectors work correctly, in case you find problems in one of these, you can replace it.
• Check the operation of the Oxygen Sensors (O2). Change if you find defects in one of these.
• Change the Three Way Catalyst (TWC).