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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When did your Check Engine Light Come On?
Does your Car Start?
Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0102 the car keeps turning off when I drive it

P0480 Cooling Fans do not operate efficiently, causing overheating. Possible fan module, engine temperature sensor for the computer, or relay that sends power to the fan module

P0141 Masda6 2006

P0909 P0909

P0122 Cadillac CTS
CADILAC 2007 CTS IT WILL START BUT REDUCED POWER




Other Check Engine Light Codes

P0107   Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
P0260   Injection Pump Fuel Metering Control 'B' Intermittent (Cam/Rotor/Injector)
P0274   Cylinder 5 Injector Circuit High
P0359   Ignition Coil 'I' Primary/Secondary Circuit
P0393   Camshaft Position Sensor 'B' Circuit High Input (Bank 2)
P0444   Evaporative Emission Control System Purge Control Valve Circuit Open
P0572   Cruise Control/Brake Switch A Circuit Low
P0770   Shift Solenoid 'E'
P0852   Park/Neutral Switch Input Circuit High
P0986   Shift Solenoid "E" Control Circuit High




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