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P0152 Severity
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
The purpose of the oxygen sensor is to measure the oxygen content in the exhaust gases after they leave the combustion process of the engine. This information is critical to the PCM's ability to maintain efficient fuel economy. When the PCM detects a failure of the sensor or the information received from the sensor, it will set code P0152.
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The purpose of code P0152 is to track the amount of time that the Oxygen Sensor or Air Fuel Ratio Sensor takes to go from indicating that the fuel control system is in open loop to rapidly switching above and below the 450-millivolt set point, thus indicating that the fuel control system is in closed loop. P0152 is set when there is a sustained high voltage signal from the Oxygen Sensor for a specified amount of time.