P CODES (POWERTRAIN) P0400 - P0499 P0420

I Have This Code Showing Up On My Buick Can You Let Me Know What Types Of Things Can Throw This.

Caty. Conv. Efficiency Low Bank One. The Converter Has Been Replaced And The Code Later Appeared Again. The Oxygen Sensor Was Then Replaced...

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...

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....

Gave Car Tune Up And Found Vacuum Leak, Engine Light Still Comes On, Code 420,430

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...

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...

97 Acura Cl 2.2 120k Miles The Code Indiacates Catalyst System Efficiency Below Threshold Bank (1) Any Idea On How To Correct

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...

I Am Still Receiving A P420 Code After Replacing The Entire Exhaust System Including The Exhaust Pipe, Cat Converter, O2 Sensors Before...