P0421 OBD Engine Code Logo   Code #P0421 -
Warm Up Catalyst Efficiency Below Threshold (Bank 1)

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Mitsubishi Montero Sport
Chekc


Na

Hyundai Sonata
code p0421


nothing just searching how to do the job

clear catalyst bank 1 bank 2

Mitsubishi Montero Sport
service light is on


check engine #P0421, P0455

ser my problem is how fix the code p0421 1 know what happen bot I don't know how catalystic it.i get Mitsubishi endeavor 2004

p0421 p0431

Check engine light and emmision light on

Mitsubishi Eclipse
p0421




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Other Comments

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p0421


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Me aparece error y no se que es




Other Check Engine Light Codes

P0011   'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
P0083   Intake Valve Control Solenoid Circuit High (Bank 2)
P0128   Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0165   O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)
P0221   Throttle/Pedal Position Sensor/Switch 'B' Circuit Range/Performance Problem
P0271   Cylinder 4 Injector Circuit High
P0295   Cylinder 12 Injector Circuit High
P0310   Cylinder 10
P0372   Timing Reference High Resolution Signal 'A' Too Few Pulses
P0897   Transmission Fluid Deteriorated




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