If the oxygen sensor circuit is not functioning properly, the ECU will not be able to receive the correct information about the oxygen content in the exhaust gases. This can cause the engine to run rich or lean, which can lead to a number of problems, including decreased fuel economy, increased emissions, and engine damage.
To fix a code 14, you will need to replace the oxygen sensor. The oxygen sensor is located in the exhaust pipe, near the engine. You will need to remove the old oxygen sensor and install the new one. The new oxygen sensor should come with a new gasket. Be sure to use the new gasket when installing the new oxygen sensor.
Once you have replaced the oxygen sensor, you will need to clear the code from the ECU. You can do this by using a scan tool or by disconnecting the battery for at least 30 seconds.
If the code 14 returns, you will need to have the vehicle inspected by a qualified mechanic to determine the cause of the problem.
