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P0038/P0044/P0058/P0064 Heater Control Circuit High

  • Ensure the oxygen sensor’s heater circuit element is within the OEM’s specifications.
  • If using the heater circuit simulator included with the iO2SS, ensure it is connected to the correct wires.
  • Inspect the wiring harness for short circuits.
  • Ensure the oxygen sensor heater circuit’s fuse isn’t blown.
  • If this problem persists, your car may require a higher resistance heater circuit simulator. In this case, contact for further support.

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