Tire air pressure sensor?

The system must be reset which you can use the remote to perform, check out the instructions below.

Alternate Keyless Entry Transmitter or DIC Learn Enable Method

Ignition ON, initiate the TPM Learn Mode using one of the following procedures. On vehicles equipped with keyless entry, simultaneously press the keyless entry transmitters lock and unlock buttons until a double horn chirp sounds indicating the Learn Mode has been enabled. The left front turn signal will also be illuminated.

On vehicles not equipped with keyless entry, press and release the driver information center DIC INFO button until the TIRE LEARN message appears on the DIC display. Press and hold the SET RESET button until a double horn chirp sounds indicating the Learn Mode has been enabled. The left front turn signal will also be illuminated. Starting with the left front tire, learn the tire pressure using one of the following methods. Hold the antenna of the aimed upward against the tire sidewall close to the wheel rim at the valve stem location. Press and release the activate button and wait for a horn chirp. Once the horn chirp has sounded, the sensor information is learned and the turn signal in the next location to be learned will illuminate.

Caution! Over inflating tires may cause personal injury or damage to the tires and wheels. When increasing tire pressure do not exceed the maximum inflation pressure as noted on the tire sidewall.

Increase or decrease the tire pressure for 8 to 10 seconds then wait for a horn chirp. The horn chirp may occur before or up to 30 seconds after the 8 to 10 second pressure increase or decrease time period has been reached. Once the horn chirp has sounded, the sensor information is learned and the turn signal in the next location to be learned will illuminate.

After the horn chirp has sounded and the right front turn signal is illuminated, repeat step 2 for the remaining 3 sensors in the following order
Right front
Right rear
Left rear

When the left rear sensor has been learned and a double horn chirp has sounded, the learn process is complete and the RCDLR exits the learn mode.
Ignition OFF, adjust all tires to the recommended pressures. Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label.

This post has been updated please check out the post for instructions above.