cat bad,

來源: Marauders 於 2026-02-25 20:54:14 [] [舊帖] [給我悄悄話] 閱讀數 : (178 bytes)

use OBDII scan, if front and back o2 sensor reading the same, then cat is not functioning. If cat is working, back o2 sensor should read more stable than front o2. 

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