What is OBD II code P1406 and how can I fix it?

1996 PONTIAC GRAND AM
184,500 MILES
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NATE_81
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  • 3 POSTS
I just bought a1996 Pontiac Grand Am Gt with the 3100 V6. It has a few problems that I can fix that are easy, but and thankfully it only has one code coming up and that is P1406. I have tried to look up this code but I am getting no were quick. Can you help me figure out what this is and how I might be able to fix the problem. Thank you
Feb 28, 2012 at 1:02 AM
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BILLYMAC
  • ✓ASE Certified Mechanic
  • 2,204 POSTS
  • ASE Certified Mechanic
P1406 – Heated Catalyst Internal Control Module Checksum/ROM Error
this is a code for ecm computer internal failure
Feb 28, 2012 at 1:19 AM
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