Where is the O2 sensor on a Chevy?
Downstream sensors Bank 1 Sensor 2 and Bank 2 Sensor 2 can be accessed from under the vehicle. Do not touch the sensor or the heat shield until the engine cools down. Disconnect the O2 sensor. Press the connector and pull it away to unplug the oxygen sensor.
What’s the best way to change an O2 sensor?
Unplug the wire at the connector and remove O2 sensor. They do sell a special tool, but you can do it with a crescent wrench. Use some liquid wrench first. Apply anti-seize to the threads of the new O2 sensor for ease of installation and reconnect the wire.
What happens if you set code on downstream O2 sensor?
With this code set you will be running in open loop regardless of the reason the code is set. Constant open loop operation can’t be good for the cat. If this code only applies to the downstream O2 sensor then it will not affect the open/closed loop operation of the engine. The downstream O2 sensor controls the heat of the catalytic converter.
Is the O2 sensor on my Subaru not working?
OK, the heating circuit has failed on my downstream O2 sensor (CEL code P0141). As I understand it, this sensor does not affect fuel trim but only monitors exhaust. My Subaru still runs fine with a very slight decrease in MPG. Dealer wants over $300 to replace and says if the sensor is not replaced, damage will occur to catalytic converters.
What happens when you change the O2 sensor?
The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle’s computer. The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. Sometimes an O2 sensor fails, and you need to replace it.
Downstream sensors Bank 1 Sensor 2 and Bank 2 Sensor 2 can be accessed from under the vehicle. Do not touch the sensor or the heat shield until the engine cools down. Disconnect the O2 sensor. Press the connector and pull it away to unplug the oxygen sensor.
OK, the heating circuit has failed on my downstream O2 sensor (CEL code P0141). As I understand it, this sensor does not affect fuel trim but only monitors exhaust. My Subaru still runs fine with a very slight decrease in MPG. Dealer wants over $300 to replace and says if the sensor is not replaced, damage will occur to catalytic converters.
What’s the best way to remove an oxygen sensor?
Unscrew the oxygen sensor off the exhaust pipe using either an open-end wrench or a special socket made to remove it. The majority of oxygen sensors will take an SAE 7⁄8 inch (2.2 cm) wrench.