TorqueMech Beta
TorqueMech OBD Code Guide

P0147 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 3)

Bank 1 sensor 3 oxygen sensor heater circuit fault detected.

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Code Overview

Bank 1 sensor 3 oxygen sensor heater circuit fault detected.

Common Causes

  • Failed heater element
  • Blown fuse
  • Open wiring
  • Poor connector contact

Diagnostic Steps

  1. Check heater circuit fuse and power supply
  2. Measure heater resistance if accessible
  3. Inspect the sensor connector for heat damage

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