The P0430 code on your 2020 Dodge Charger indicates the catalytic converter on bank 2 is not meeting efficiency thresholds. Bank 2 is the opposite side from cylinder 1, and this code indicates that specific catalyst has degraded.
Bank 2 Identification
On the Charger's V6 or V8 engines, bank 2 is the cylinder bank not containing cylinder 1. On the 5.7L and 6.4L HEMI V8s, bank 2 is typically the driver's side. On the 3.6L Pentastar V6, bank 2 is the rear cylinder bank.
Charger Engine Options
The 2020 Charger offers the 3.6L Pentastar V6, 5.7L HEMI V8, 6.4L HEMI V8, and supercharged 6.2L Hellcat. Each has separate catalysts for each cylinder bank. P0430 specifically indicates the bank 2 catalyst while bank 1 may still function properly.
Why Bank 2 Specifically
Sometimes one bank's catalyst fails before the other due to uneven wear, a problem affecting one bank (like injector issues causing rich running), or physical damage affecting only one catalyst. The independent monitoring allows precise identification.
Diagnostic and Repair
Use Stellantis wiTECH to monitor bank 2 catalyst efficiency. Compare upstream and downstream O2 sensor patterns. Check for exhaust leaks on bank 2. Verify no engine problems affect bank 2 more than bank 1. A failed catalyst requires replacement—consider replacing both banks simultaneously if mileage is high.