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Trouble Codes
P Codes (Powertrain)
P0400 - P0499
P0420
P CODES (POWERTRAIN) P0400 - P0499 P0420
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1997 Buick Skylark P0420
I Have This Code Showing Up On My Buick Can You Let Me Know What Types Of Things Can Throw This.
Asked by
joshuadorsey
·
2 ANSWERS
1997
BUICK SKYLARK
Fault Code Po420
Caty. Conv. Efficiency Low Bank One. The Converter Has Been Replaced And The Code Later Appeared Again. The Oxygen Sensor Was Then Replaced...
Asked by
David Sipila
·
2 ANSWERS
1998
CHEVROLET ASTRO
2000 Mitsubishi Galant CODE P0420/P0420
This Code Is The Only One That Keeps Appearing Pending Twice In My Car, Now It Makes A Loud Funny Vibration Noise When You First Press The...
Asked by
MYSWEETX5
·
1 ANSWER
2000
MITSUBISHI GALANT
2006 Subaru Impreza OBD-II Code P0420
I Am Showing This Code, And Have Noticed That, When The Car Is First Turned On And Shifting From Reverse To Drive (automatic), It Bucks....
Asked by
johnnyinterwebs
·
1 ANSWER
2006
SUBARU IMPREZA
P0420
Gave Car Tune Up And Found Vacuum Leak, Engine Light Still Comes On, Code 420,430
Asked by
mollie bennett
·
1 ANSWER
1996
FORD TAURUS
1999 Chevy Tahoe Diagnostic Code P0420
My Servie Engine Light Is On My Friend Looked Up The Code And It Said. Catalyst System Efficiecy Below Threshold [bank 1] What Does This...
Asked by
Mike Michon
·
1 ANSWER
1999
CHEVROLET TAHOE
P0420 Catalyst Efficiency Below Threshold(bank 1)
I Have A 2000 Honda Odyssey Ex 124000 Miles With Automatic Transmission. I Am Assuming My Problem Is With O2 Sensor On Bank 1, My Question...
Asked by
juarezleo
·
1 ANSWER
HONDA ODYSSEY
Code P0420
97 Acura Cl 2.2 120k Miles The Code Indiacates Catalyst System Efficiency Below Threshold Bank (1) Any Idea On How To Correct
Asked by
fburks
·
1 ANSWER
ACURA CL
Emissions Code P0420
Engine Light Came On. This Is The Code That Came Up. Two Days Later The Light Went Off On Its Own. I Made An Appointment To Have The Part...
Asked by
Vmcharger
·
1 ANSWER
2013
DODGE CHARGER
1998 Chevy Cavalier P0420 Code
I Am Still Receiving A P420 Code After Replacing The Entire Exhaust System Including The Exhaust Pipe, Cat Converter, O2 Sensors Before...
Asked by
bstash143
·
1 ANSWER
1998
CHEVROLET CAVALIER
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