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1. 

   Check Engine Light

   DTC code P0420: "The ECM compares the waveform of the oxygen sensor located before the catalyst with the waveform of the oxygen sensor located after the catalyst to determine whether or not catalyst performance has deteriorated." Trouble area: Three way catalytic converter Open or short in...

   • Words: 76
   • cruiserdan
   • Post #7
   • Apr 2, 2003
   • Forum: 80-Series Tech
2. 

   Check Engine Light

   Tenn, &nbsp:Did you save the posts on that? I can lookup the info and re-post if need be....... Regards...Dan :beer:

   • Words: 24
   • cruiserdan
   • Post #5
   • Apr 2, 2003
   • Forum: 80-Series Tech
3. 

   Check Engine Light

   Doschev, What was the exact code or codes pulled. There are several that pertain to O2 sensors.......We need more specifics to be able to assist you..........

   • Words: 28
   • cruiserdan
   • Post #2
   • Apr 2, 2003
   • Forum: 80-Series Tech