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'99 Jimmy with P0420 TC - Catalyst System Efficiency Below Threshold (Bank 1)
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04-06-2005, 12:37 AM
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drdd
AF Enthusiast
Join Date: Mar 2005
Location: bowling green, Kentucky
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Pcv
I replace the PCV valve (2 minute, 2 dollar problem) and it cleared the catalyst system effieciencty code plus three others !!!
drdd
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