DTC C12E7 GMC

HO2S-21 (Bank 2 Sensor 1) Heater Circuit Malfunction

HO2S-21 (Bank 2 Sensor 1) Heater Circuit Malfunction

Description

DTC P0101-P0103, P0117, P0118 and P0134 not set, ECT sensor change over 50ºF from last ignition cycle, engine did not stall, HO2S-11 bias voltage from 352-546 mv, and the PCM detected it took to long for the HO2S signal to reach 151 mv over or under the b

Video Guide

Duration: PT4M28S | Uploaded: 2020-06-20

Diagnostic Info

  • DTC Code: C12E7
  • Brand: GMC
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