p0420 catalytic converter
Automotive Diagnostics DIY P0420 Fix vs Pro Repair
The average catalytic converter replacement in 2024 tops $1,200, yet a DIY approach can keep costs under $300. DIY can often clear a P0420 code and avoid a pricey part, but a professional repair guarantees the converter’s integrity if it truly fails. Automotive Diagnostics for New Subaru Owners