Can Replacing Car Battery Reset Check Engine Light?

The check engine light is a warning light that is illuminated when there is a problem with the engine or emissions system. The most common cause of the check engine light is a problem with the oxygen sensor, which is responsible for measuring the amount of oxygen in the exhaust gases.

Replacing the car battery will not reset the check engine light. The check engine light is only reset when the problem that caused it to illuminate has been fixed.

Why Won’t Replacing the Battery Reset the Check Engine Light?

The check engine light is controlled by the powertrain control module (PCM), which is the computer that controls the engine and emissions system. The PCM stores a code that corresponds to the problem that caused the check engine light to illuminate. When the problem is fixed, the PCM will clear the code and turn off the check engine light.

Replacing the car battery will not clear the code stored in the PCM. The only way to clear the code is to fix the problem that caused it to be set.

What Should I Do If the Check Engine Light Is On?

If the check engine light is on, it is important to have the problem diagnosed and repaired as soon as possible. Driving with the check engine light on can damage the engine and emissions system.

To diagnose the problem, you will need to take the car to a mechanic. The mechanic will use a scan tool to read the code stored in the PCM and determine the cause of the problem.

Once the problem has been diagnosed, the mechanic will repair it. After the repair is complete, the mechanic will clear the code from the PCM and turn off the check engine light.

Conclusion

Replacing the car battery will not reset the check engine light. The only way to reset the check engine light is to fix the problem that caused it to illuminate.

If the check engine light is on, it is important to have the problem diagnosed and repaired as soon as possible. Driving with the check engine light on can damage the engine and emissions system.