P0430
P0430 - Catalyst System Efficiency Below Threshold Bank 2
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Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible causes
- 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)
- 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)
Tech notes
The most common cause it the three way catalyst converter Bank 2. Changing just the O2 sensor usually don't repair the problem. If the P0430 code is combined with other codes, try fixing the other codes first.
P0430 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.
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.
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.
- Three way catalyst converter Bank 1 does not have enough oxygen storage capacity.
P0430 Information for specific makes
P0430 INFINITI
P0430 NISSAN
P0430 TOYOTA
P0430 LEXUS
P0430 FORD
P0430 CHEVROLET
P0430 HONDA
P0430 ACURA
P0430 BMW
P0430 CHRYSLER
P0430 DODGE
P0430 JEEP
P0430 HYUNDAI
P0430 KIA
P0430 MAZDA
P0430 MITSUBISHI
P0430 AUDI
P0430 VOLKSWAGEN
P0430 NISSAN
P0430 TOYOTA
P0430 LEXUS
P0430 FORD
P0430 CHEVROLET
P0430 HONDA
P0430 ACURA
P0430 BMW
P0430 CHRYSLER
P0430 DODGE
P0430 JEEP
P0430 HYUNDAI
P0430 KIA
P0430 MAZDA
P0430 MITSUBISHI
P0430 AUDI
P0430 VOLKSWAGEN
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