How do you remove an oxygen sensor from a catalytic converter?
Step 3: Remove any oxygen sensors. If required, remove any oxygen sensors that may be mounted directly in or near the catalytic converter. If no oxygen sensor is mounted in the catalytic converter, or need be removed, proceed to step 4. Step 4: Spray penetrating oil.
What’s the best way to replace a catalytic converter?
Installation Always defer to any included instructions. Insert any gaskets supplied with the new catalytic converter. Put the new catalytic converter in place. Finger-tighten nuts on the bolts. Tighten down all the bolts. Alternatively, weld the converter into place. Screw the oxygen sensor back into place. Double-check your work.
What happens when a catalytic converter becomes defective?
When a catalytic converter becomes defective, the signal from the rear oxygen sensor begins to duplicate the switching signal of the front oxygen sensor. The PCM then uses a mathematical algorithm to determine when the downstream signal exceeds FTP standards.
How much torque do you need for a catalytic converter?
Tighten these bolts completely and then finish tightening the front of the catalytic converter flange nuts or bolts. The torque specifications for both are 25 to 30 foot pounds. Reconnect the Oxygen Sensors: Reach up and remove the oxygen sensors connectors from there safe place and start to reconnect them.
Do you need an oxygen sensor for a catalytic converter?
Most modern catalytic converters are equipped with one or more oxygen sensors that monitor the efficiency of the car’s exhaust system continuously. If your catalytic converter has an attached oxygen sensor, use an oxygen sensor socket and a ratchet wrench to disconnect it before proceeding.
Do you have to replace the catalytic converter?
If they replace the catalytic converter, they are going to insist on replacing the oxygen sensors as well or they won’t stand behind their work.
How can I clear an error code on my catalytic converter?
This will reset the computer and clear the existing error codes. Locate the oxygen sensor that is downstream (closer to the tailpipe) of the catalytic converter. Remove the sensor, and take to your local car parts store. Find the part called a spark plug defouler.
Why is my catalytic converter reading lean 0.1v?
An exhaust system leak really screws up the P0420 testing routing. An exhaust leak near the upstream sensor can cause the downstream sensor to read a steady lean condition. The ECM would interpret that as a bad catalytic converter. In that case, your OBDII scanner should be reading a lean 0.1v reading from the downstream sensor.