P0420Średni
Wydajność katalizatora poniżej progu — bank 1
Układ napędowy
Sprawdź szczegóły →P0420HK
ŚredniCatalyst — Efficiency Below Threshold (Hyundai/Kia)
OBD-II (EN): Catalyst System Efficiency Below Threshold
Code P0420HK — Catalyst — Efficiency Below Threshold (Hyundai/Kia). Symptoms: check engine light. Possible cause: worn catalytic converter. Professional diagnosis recommended.
Symptoms
Check engine light, increased emissions
Possible causes
Worn catalytic converter, faulty oxygen sensor
Affected systems
Related codes
Universal version
This code has a universal OBD-II form:
P0420Wydajność katalizatora poniżej progu — bank 1Code P0420HK appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Tags and synonyms
Does code P0420HK require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.