86 Le Sabre Code reader problems

M

motorbreath

Guest
I recently purchased a 1986 Le Sabre 2 door.
It has a funny knock, so I decided to use a code reader to narrow down the problem(s).

When I plug the reader in and turn the ign. on the "Service Engine Soon" light comes on but does not blink. I know that the first code should be 12 for system pass. I have a manual from Haynes, but it assumes your vehicle will test, and goes no further.

Could my ECM be baked and no longer communicating with the vehicle ?

Any help or direction would be greatly appreciated.

Rick
 
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