what do trouble code 6122 and 6420 mean ?

1990 BUICK REATTA
170,000 MILES
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PJJACKSON567
  • MEMBER
  • 1 POST
car turns over but will not start and acts like it has no spark.
Sep 16, 2012 at 9:15 PM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
Where and how did you get the codes? Our database does not have any reference to these codes.
Sep 16, 2012 at 10:06 PM
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