# 02 sensor heater circuit on 1989 ford taurus **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 16, 2008, 3:23pm UTC](https://community.cartalk.com/t/02-sensor-heater-circuit-on-1989-ford-taurus/20792 "2008-10-16T15:23:39Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Bob\_Steen](https://avatars.discourse-cdn.com/v4/letter/b/cdc98d/32.png) [@Bob\_Steen](https://community.cartalk.com/u/Bob_Steen)\ **Post date:** [October 16, 2008, 3:23pm UTC](https://community.cartalk.com/t/02-sensor-heater-circuit-on-1989-ford-taurus/20792/1 "2008-10-16T15:23:39Z")
Check engine light on, my OBC shows bank2 sensor2 circuit malfunction, is this located before or after the converter not sure were to look. thanks Bob Steen ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [October 16, 2008, 4:20pm UTC](https://community.cartalk.com/t/02-sensor-heater-circuit-on-1989-ford-taurus/20792/2 "2008-10-16T16:20:23Z")
Bank 2 is the opposite side of Bank 1 which is related to number 1 cylinder. Sensor 1 for each bank is before the CAT and sensor 2 for each side is after the CAT. There has recently been a couple of posts on this site pertaining to Ford heater circuit problems. The problem has been with the ECU or PCM module. One poster found a replacement unit at a salvage yard for $25 dollars and fixed the trouble. You can do a search for the thread “Sordid Tale”. Grab some coffee and be ready to sit for awhile. ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [October 17, 2008, 11:46am UTC](https://community.cartalk.com/t/02-sensor-heater-circuit-on-1989-ford-taurus/20792/3 "2008-10-17T11:46:37Z")
Post the exact code; then, we can tell you (hopefully) what you can do.