Cadillac Repair: P1108 AND P1406 SCAN CODES, gm website, valve position

Question
I HAVE A 96 SEDAN DEVILLE AND SOMETIMES MY CAR WILL START TO RUN ROUGH AND THE MONITORING SYSTEM DISPLAYS A SERVICE EMISSIONS, AND THE SERVICE ENGINE LIGHT COMES ON.  SOMETIMES THE ENGINE WILL CUT OFF, BUT WILL RESTART.  I SCANNED FOR CODES AND GOT P1108 MFR CONTOL FUEL AIR METERING AND P1406 MFR AUXILARY EMISSIONS CONTROL. A GM WEBSITE WITH CODES SAID P1108 WAS BARO TO MAP SENSOR TO HIGH AND P1406 WAS EGR VALVE POSITION CIRCUIT.  WHAT DO MY CODES MEAN?  WHAT DO YOU THINK THE PROBLEM IS? I ALREADY CHANGED THE MAP SENSOR. THANK YOU.

Answer
Every few years they change the codes from what they represent.

One year P1212 might mean EGR fault. 2 years later P1212 might mean HEADLIGHT OUT.

You need to use the code that matches your vehicles YEAR AND MAKE.

I do not have a 1996 year book so I can't tell you which is correct.

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