P0041 Downstream Oxygen Sensors Swapped From Bank To Bank

• If using two separate iO2SS's in piggy-back mode, verify that each unit's output (green wire) is connected to the appropriate oxygen sensor signal wire leading to the PCM. Reverse the wires if the problem persists.
• If using a single, dual output iO2SS in piggy-back mode, your car may require two individual single output iO2SS's instead.
• If using an iO2SS in stand-alone mode and this error code occurs, contact support@symtechlabs.com for further support.

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