Thread: 16v 02 wires?
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Old 05-31-2003, 11:35 AM
Tinker Tinker is offline
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Join Date: May 2000
Posts: 376

There are three wires to/from the O2 sensor. The two that are the same gauge and use the same connector are the power and ground for the sensor. The single green (?) wire with a different plug is the signal wire to the ECU.

You won`t damage it by reading the voltage from the sensor. Leave the power/ground wires connected to keep it properly heated and make sure the motor is good and hot.

The green signal wire is shielded, so be careful if/when you decide to splice into it.

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