Engine Code P0420 Jeep
P0420 catalyst system efficiency below threshold (bank 1) Code p0420 Sensor o2 oxygen p0420 bank p0140 circuit clean catalyst efficiency code below system threshold catalytic converter sensors low ho2s heater
Code P0420 - Jeep Cherokee Forum
2001 exhaust code sensors sensor bank o2 xj p0420 cat po141 cherokee 2000 circuit heater but jeep location codes need
