If the O2 (oxygen) upstream sensor in your 2014 Jeep Compass is showing a circuit high voltage error code, it means that the sensor is detecting a voltage reading that is higher than expected.
Faulty O2 Sensor
The most common reason for this error is a faulty oxygen sensor. Over time, oxygen sensors can wear out and fail, leading to inaccurate voltage readings.
Wiring Issues
There could be a problem with the wiring leading to the sensor. Damaged or corroded wires can disrupt the electrical signal and cause the sensor to read incorrectly.
Exhaust Leaks
If there are leaks in the exhaust system before the sensor, it can introduce extra oxygen into the exhaust stream, causing the sensor to read high voltage.
Engine Problems
Engine issues such as a misfire or a rich fuel mixture can also cause the O2 sensor to read high voltage. It's essential to ensure that your engine is running correctly.
