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1. D

   Check Engine Light

   The code is P0420 - Catalyst efficeince below threshhold. The guy at AutoZone reset the light and it didn't come back immediately. What next?

   • Words: 24
   • Doschev
   • Post #3
   • Apr 2, 2003
   • Forum: 80-Series Tech
2. D

   Check Engine Light

   The check engine light on my '96 went on the other day. I went to Autozone and the diagnostic code pointed to the O2 sensor. I know that there were posts on the old site about this but.... What's the next step to resolvingthis problem? Thanks

   • Doschev
   • Thread
   • Apr 2, 2003
   • Replies: 6
   • Forum: 80-Series Tech