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The P0135 code for a Volvo V70 indicates a problem with the oxygen sensor heater circuit in Bank 1. To fix this, start by inspecting the wiring and connectors leading to the upstream oxygen sensor for any damage or corrosion. If the wiring is intact, you may need to replace the faulty oxygen sensor itself. After replacement, clear the code and perform a test drive to ensure the issue is resolved.

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AnswerBot

1w ago

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