DTC U1147 GMC

O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)

O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)

Description

The ECM monitors input voltage from rear HO2S. If the input voltage from the rear HO2S sensor is to high, the ECM determines that circuit input is high.

Cause and Solution

Rear HO2S or ECM terminal shortedShort to power supply in wiring harness Rear HO2S malfunctionECM malfunction

Video Guide

Duration: PT4M5S | Uploaded: 2020-07-11

Diagnostic Info

  • DTC Code: U1147
  • Brand: GMC
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