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P0037/P0043/P0057/P0063 Heater Control Circuit Low
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 open circuits.
Ensure the oxygen sensor heater circuit’s fuse isn’t blown.
If this problem persists, your car may require a lower resistance heater circuit simulator. In this case, contact
support@symtechlabs.com for further support.
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