Error code
OBD2 P0430
OBD2P0430
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Catalyst System Efficiency Below Threshold.
Severity
highCan be driven short distances but should not be ignored.
Summary
P0430 indicates that the catalytic converter system efficiency is below threshold on bank 2 of your vehicle's engine.
Symptoms
- Check Engine Light (CEL) illuminated
- Decreased fuel economy
Common Causes
- Faulty or clogged catalytic converter
- Wiring issues related to the oxygen sensor downstream of bank 2
- Failed oxygen sensor (HO2S) downstream of bank 2
Diagnosis
- Check oxygen sensor readings upstream and downstream of the catalytic converter
- Perform a propane test to verify catalytic converter efficiency
Fixes
- Replace faulty or clogged catalytic converter
FAQ
What does the P0430 code mean?
The P0430 code indicates that the efficiency of the catalytic converter system on bank 2 is below an acceptable threshold.
How do I diagnose a P0430 code?
Diagnose by checking oxygen sensor readings and performing a propane test to verify the condition of the catalytic converter.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0400Exhaust Gas Recirculation Flow
- P0401Exhaust Gas Recirculation Flow Insufficient Detected
- P0402Exhaust Gas Recirculation Flow Excessive Detected
- P0403Exhaust Gas Recirculation Control Circuit
- P0404Exhaust Gas Recirculation Control Circuit Range/Performance
- P0405Exhaust Gas Recirculation Sensor 'A' Circuit Low
- P0406Exhaust Gas Recirculation Sensor 'A' Circuit High
- P0407Exhaust Gas Recirculation Sensor 'B' Circuit Low
- P0408Exhaust Gas Recirculation Sensor 'B' Circuit High
- P0409Exhaust Gas Recirculation Sensor 'A' Circuit
- P0410Secondary Air Injection System
- P0411Secondary Air Injection System Incorrect Flow Detected