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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Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0572 po572

P0661 P0661

P0748 intermitant loss of powe. when i take off very sluggish then picks up to normal. doesnt do it all the time

P0144 Engine shake when you are stop on idle

P0481 Chrysler PT Cruiser
code p0481




Other Check Engine Light Codes

P0215   Engine Shutoff Solenoid
P0261   Cylinder 1 Injector Circuit Low
P0336   Crankshaft Position Sensor A Circuit Range/Performance
P0362   Ignition Coil 'L' Primary/Secondary Circuit
P0505   Idle Control System
P0550   Power Steering Pressure Sensor Circuit
P0745   Pressure Control Solenoid 'A'
P0834   Clutch Pedal Switch 'B' Circuit Low
P0849   Transmission Fluid Pressure Sensor/Switch 'B' Circuit Intermittent
P0979   Shift Solenoid "C" Control Circuit Low




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