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OBD Data Link Connector showing no Voltage, failure on emission test? What is wrong?

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OBD Data Link Connector showing no Voltage, failure on emission test? What is wrong? 2007 Toyota Yaris S

Vehicle: 2007 Toyota Yaris S

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Hi there

Usually know voltage at the OBDII port is caused by a blown fuse or a bad pin in the port itself. I would check the fuses under the dash as it is the most common cause.

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