P0430 Toyota - Catalyst System Efficiency Below Threshold Bank 2
- Three way catalyst converter Bank 2
- Exhaust tube
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module (ECM)
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.
When is the code detected?
- Three way catalytic converter Bank 1 does not operate properly.
- Three way catalyst converter Bank 1 does not have enough oxygen storage capacity.
- Engine Light ON (or Service Engine Soon Warning Light)
P0430 Toyota Description
The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).
A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.
P0430 Toyota Information for specific Toyota models
Need more help?
Do you need more help with the P0430 Toyota code? ask a question to our users or search the top hand picked automotive forums for more information
TOYOTA Technical Service Bulletins for P0430 code
2001 TOYOTA HIGHLANDER Engine And Engine Cooling:engine Details
2002 TOYOTA HIGHLANDER Engine And Engine Cooling:engine Details
2003 TOYOTA HIGHLANDER Engine And Engine Cooling:engine Details
2001 TOYOTA HIGHLANDER 061000 Engine And Engine Cooling:engine Details
2002 TOYOTA HIGHLANDER 061000 Engine And Engine Cooling:engine Details
Repair Shops Around Your Area
Need parts to fix this code? Search hundreds of stores at the same time and compare prices
Help us improve Engine-Codes.com. Leave a comment below or tell us if the information above help you fix the code. What are symptoms is your vehicle for the P0430 Toyota code?
Have you replaced any parts?
Any information is appreciated. Thanks