P0430
P0430 — Catalyst System Efficiency Below Threshold B2
1
Driver reports
1
Solved cases
1
Verified fixes
0
Wrong repairs reported
📊 Diagnostic Overview
Severity, cost and difficulty for P0430, based on data already on this page.
Severity
🟡 Medium
Diagnostic Difficulty
Not enough data yet
System
Engine
Common Causes (based on confirmed repairs)
- P0430 = Bank 2 catalytic converter efficiency low (passenger side on most vehicles). Same diagnosis as P0420 but for opposite bank. On V6/V8 with dual exhaust: check both O2 sensor sets. If both P0420 and P0430 active, check for common cause like running 1 vehicle
📐 Diagnostic Difficulty reflects how many different repairs drivers have tried for P0430 and how often those attempts turned out to be the wrong fix — it is calculated from MyCarFault's own reports, not an official manufacturer rating.
⭐ MOST VERIFIED FIX FOR P0430
P0430 = Bank 2 catalytic converter efficiency low (passenger side on most vehicles). Same diagnosis as P0420 but for opposite bank. On V6/V8 with dual exhaust: check both O2 sensor sets. If both P0420 and P0430 active, check for common cause like running
Reported in 1 approved case
·
⚪ Unverified
Top Reported Fixes for P0430
Ranked by confidence score — same vehicle matches weighted higher.
Driver Reports — P0430 1 report
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