DTC C121 GMC

HO2S Heater Control Circuit Short to Positive

HO2S Heater Control Circuit Short to Positive

Description

Heating of component G3 4 (Right O2 sensor, before TWC [KAT]) : Short circuit to positive

Cause and Solution

Heating of component G3 4 (Right O2 sensor, before TWC [KAT]) : Short circuit to positive.Right O2 sensor

Video Guide

Duration: PT4M | Uploaded: 2020-06-20

Diagnostic Info

  • DTC Code: C121
  • Brand: GMC
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