DTC B0004 Hummer

O2S Sensor WRAF-IC Supply Voltage Too Low (Bank 2 Sensor 1)

O2S Sensor WRAF-IC Supply Voltage Too Low (Bank 2 Sensor 1)

Description

Engine started and the fault entry trips after the criterion remains present for 2 seconds, battery voltage must be at least 11v, and an the monitor for the CJ125 chip power supply was found that the voltage was too low. The battery voltage must be betwee

Cause and Solution

Internal HW fault in control moduleReplace control module

Video Guide

Duration: PT4M8S | Uploaded: 2020-06-20

Diagnostic Info

  • DTC Code: B0004
  • Brand: Hummer
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