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P0420 on Mazda Mx 5 2019
2019 Mazda Mx 5 OBD code pages help users narrow down common diagnostic searches for this vehicle combination. These pages are useful when someone wants to understand fault codes in the context of a specific make, model and year rather than just reading a generic code definition.
P0420 means catalyst system efficiency below threshold (bank 1).
This route connects the vehicle year page with the main code page so users can browse by make, model, year and fault code.
Main code page
View P0420 code meaningOther codes for this vehicle
P0354
Ignition Coil D Primary / Secondary Circuit Malfunction
P0011
Intake Camshaft Position Timing - Over-Advanced (Bank 1)
P0012
Intake Camshaft Position Timing - Over-Retarded (Bank 1)
P0014
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)
P0016
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A
P0017
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B
P0335
Crankshaft Position Sensor A Circuit Malfunction
P0340
Camshaft Position Sensor Circuit Malfunction