OBD-II trouble code: HO2S heater control circuit low (bank 2 sensor 1)

Tiny
CGOETZ1984
  • MEMBER
  • 2004 TOYOTA 4RUNNER
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 246,000 MILES
I have changed the sensor, checked the fuse and wiring. What would my next step be?
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Saturday, October 24th, 2020 AT 2:59 PM

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Tiny
KASEKENNY1
  • EXPERT
Unfortunately that leaves wiring or the ECM. I attached the testing that we need to do that will prove out wiring or you can just replace the ECM. However, I have known many people that waste their money on an ECM because it didn't fix it. So if you don't want to do this testing or are not able to, I think it is worth investing to have someone check it out rather then just taking a shot at the ECM.

Take a look at this info and let me know what questions you have. Thanks
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Saturday, October 24th, 2020 AT 7:36 PM

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