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Re: O2 Sensor Heater Problem
In the vehicle harness connector to the sensor, there is only one black wire. Follow that wire through the connector and into the sensor. Remove about a half inch of insulation, (don't cut the wire) between the O2 sensor and its connector. Solder on a piece of wire and run it to ground. IF the crimp is the problem, doing it this way will bypass the crimp. This will also make it more difficult to replace the sensor in the future if necessary, but it eliminates a connection as a possible problem. It's very important to solder the connection and insulate it, DO NOT use a crimp connector.
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