Question about 2005 Buick LeSabre
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Posted on Jan 02, 2017
SOURCE: i have replaced all 4
You have most likely a sensor harness wiring problem, no signal return, at this point your system needs to be hooked up to what is called a "break out box" to see what lead is dead, most likely a broken burnt or damaged wire, there is no easy way to do this, I strongly suggest this go to the Volvo dealer for diagnosis or rewire that sensor all the way back to the PCM (Powertrain Control Module), but preform these few checks 1st before you give up, pull the connector off at the sensor and look for pushed out pins in either the male or female side of the connector, you may also want to swap that sensor with the adjacent O2 sensor and see if the code comes up for bank 2 sensor 1, in that case the new sensor is defective, that is rare but it does happen.
Posted on Jul 08, 2009
Most common reset is....... turn on the key (do not start) and depress gas pedal 3 times in 5 seconds.
Remove floor mat to do this.
It should be reset.
You may have to repeat this....it does always take on the first try.
2nd common......push mileage reset until oil life shows......once showing hold button down until 100% oil life shows.
You may have one or the other.
Posted on Nov 03, 2009
there are only two O2 sensors on your vehicle. The one before the catalytic converter is bank 1 sensor 1 (also known as upstream). The one after the catalytic converter is Bank 1 Sensor 2 (also known as downstream).
You will need to jack up the car and safely support it in order to crawl under the vehicle to access the downstream O2 sensor. Unplug the connector and use a 7/8" wrench to remove the O2 sensor from the exhaust pipe. Install the new O2 sensor, tighten until snug, and plug in the connector.
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Posted on Oct 14, 2011
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