This whole time i tracking down this issue I never had any codes. The two 02 sensors looked very different from each other, the Bosch unit only protruded 3/8" into exhaust pipe, while the Oem unit was 3/4". Much more surface area. If you have that many miles on the 02, it probably would not hurt to change it out. Just go with Denso brand OEM unit.


-1989 4x4 22re(pretty good in the mud)
- custom steel flat bed-oneside of exhaust system, and air box intake off cobra.(doesnt quite have the v8 rumble)AFM off '82 Supra.
-Destination M/T 31"-KYB monomax shocks-"add a leaf"