Service engine light ?

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holymolyNc
Posts: 33
Joined: Wed Mar 25, 2015 12:04 pm
Car: 1998 Q45
111,000miles
Stock

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Whats up guys ? So here's the thing service engine light has been on for egr valve catalytic bank 1 , so I cleared codes and driven and light came back . So today 2wks after light being on , coming home from work I noticed the light was off ?? I havent replaced either the egr or cat bank 1 sensor could this come from me driving 80% highway miles everyday? am just confused

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Q451990
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Posts: 11030
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
Location: Columbia, SC
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Maybe it likes colder ambient temperatures? It'll probably come back :frown:
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