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

Select a Code:

Mitsubishi Montero Sport


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

Report your Experience!

Tell us about Code #P0421

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

Even if you don't know the fix, please provide us all details about your experience to help others!

Other Comments

P0487 Mitsubishi Outlander
p 0487

P0662 2003 Saturn Vue Intake Manifold Tuning Control Solenoid

P0562 display on left side in the bottom corner on (display) Key Fob and Battery low clean battery post reset code with innova 3100

P0864 Djdi

P0742 Cadillac SLS
P0106 and P0742 OBD codes, SYMTOMS extremely poor fuel economy at low speeds

Other Check Engine Light Codes

P0109   Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
P0126   Insufficient Coolant Temperature for Stable Operation
P0150   O2 Sensor Circuit (Bank 2 Sensor 1)
P0414   Secondary Air Injection System Switching Valve 'A' Circuit Shorted
P0705   Transmission Range Sensor Circuit Malfunction (PRNDL Input)
P0770   Shift Solenoid 'E'
P0866   TCM Communication Circuit High
P0882   TCM Power Input Signal Low
P0914   Gear Shift Position Circuit
P0974   Shift Solenoid "A" Control Circuit High

Others were Searching For...

2004 kia rio code p0742 codigo p0742 de mazda 3 codigo p0742 jeep
codigo p0742 torque converte clutc mazda 3 falla P0742 mazda 3 hyundai tucson fault codes po230
mazda 3 p0742 mazda3 p0742 p0623 ford transit
p0742 04 duramax p0742 kia rio p0742 mazda 3
p0742 stuck on escalade que significa p0742

Home - Contact Us
All Content and Images are Copyrights of their respective parties. Copyright SellHI, LLC.