@bfrosh001: How to Reset a MAP Sensor? To reset a MAP sensor, follow these steps: 1. Turn off the vehicle and disconnect the battery for about 15 minutes. 2. Reconnect the battery, and then start the engine. 3. Allow it to idle for several minutes so the engine control unit can recalibrate. 4. Check if the check engine light is off. This process can help clear error codes and ensure proper sensor function. If issues persist, further diagnosis may be needed.