Pontiac Firebird P Codes (Powertrain)

I Got A Check Engine Light On, Gm Code P1639 Five Volts Fer, Circuit 2. The Dealer Changed The Ac Pressure Sensor. The Light Came Back On...

Where Would I Check "5 Volt Ref Circuit 2 "? I Do Not Know What That Means.

I'll Get A Code P1369 Ever Once In A While Then It Goes Out 5 Volt Ref. 2 Circuit? What Is This?

What And Where Is Code Po102 -mass Air Flow Sensor Circuit Low Input ?

I Have A Formula Showing These Codes With No Codes For The Cause. I Cleaned The Faf Sensor And The Problem Went Away I Also Changed The...

My 02 Firebird Displays A P1125 Code. What Is It And How Do I Fix It. Are There Multiple Problems And/or Solutions Or Is It A Pretty...

When The "service Engine Light" Goes On A Put A Reading Coding Machine Into The Car's Computer And Generated The Following Two Codes: ...

I Have A P0102 Dtc Code On My 1999 Ls1 Engine Which Is Showing Symptoms I Have Not Been Able To Find In Any Other P0102 Thread Or...

Hello. I Am French An I Own A 1988 Pontiac Trans Am V8 5.0l 305 Tpi With An Automatic Transmission. I Have A Big Problem With The Engine...