1997 Disco O2 Sensor Issue?


Well-known member
Sep 15, 2004
Lost Angeles
1997 D1. No CEL and Fusion OBD shows no codes, but it shows the truck is not ready for smog check. I found the following two issues digging into the readings of the report, but can't seem to locate what I'm being told. Seems odd that the sensors would fail a test, but not throw a code.

When I go to the O2 Sensors part of the report, both banks at all 4 locations show this for TID$81 Manufacturer Defined:IMG_0340.PNG

When I go to the Mode $06 portion, I found this for TID $03 - Manufacturer Defined: