Test/Replace

• The sensor is threaded into the exhaust manifold.
• It can be difficult to remove unless a special anti-seize compound is coated onto its threads.
• Torque the sensor to 30 foot-pounds using a special socket.
• A sensor that is too loose or a cracked exhaust manifold can result in a lean signal to the computer.
• Check the vents in the thimble of a replacement O2 sensor.
• There should be the same number of holes and they should face clockwise or counterclockwise like the ones on the original sensor.
• Installing the wrong sensor can result in slower cross counts.