P0420 tj wrangler Error code p0420 on 2000 tj Sensor o2 oxygen p0420 bank p0140 circuit clean catalyst efficiency code below system threshold catalytic converter sensors low ho2s heater
Error Code P0420 on 2000 TJ | Page 2 | Jeep Wrangler TJ Forum
P0420 catalyst system efficiency below threshold (bank 1)
P0420 Catalyst System Efficiency Below Threshold (Bank 1) | The Motor Guy
Error Code P0420 on 2000 TJ | Page 2 | Jeep Wrangler TJ Forum
