Thread: P0420 Code
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Old 05-14-2009, 03:43 PM
streamcast streamcast is offline
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1997 Altima
1995 Sentra
1995 Nissan sentra
 
Join Date: Jan 2009
Location: CANADA
Age: 53
Posts: 1,214
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KLL: Check the ecm grounds on the engine. I think they are located on the right side of the engine/head to the rear of the engine. Sometimes they will loosen and cause this problem. Seen it happen before.

Last edited by streamcast; 05-14-2009 at 03:44 PM. Reason: Adjust
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