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Re: 96 jetta 2l code p0135
Bank 1 is the front sensor before the catalytic converter. The two wires that are the same color are for the heating coil in the O2 sensor. Unplug the sensor and put a very sensitive voltmeter to the plug coming from the car. Do not put an ohm meter to the O2 sensor, it is very easy to burn out the heating element.
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