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2001 Pontiac Montana Code P0135 Replaced the O2 sensor Still getting the same code Now what?
Wiki User
∙ 9y ago
Ok. The O2 Sensor heater circuit has a fault, Usually a new sensor will fix it, yours did not.
The next step is to do some diagnostics.
There are a couple good YouTube vids on how to check the sensor, just ype in the code #.
If the sensor tests good then you have a wiring, computer, ground or power supply issue. To trace that down takes a wiring diagram and a couple hours. on a thirteen year old car I am going to bet broken wire.
Good Luck
Wiki User
∙ 9y ago
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