John Flinchbaugh Blog: Relearn TPMS on Bolt

I saw a tire was low on the display of my 2017 Chevy Bolt EV, so I topped up the tire with the tire inflator jumpstarter I keep in the car. The next day, I noticed it was still low, so I hit it again and brought it up a little higher. When I checked in the car again, I saw it’s still low, but the back tire is high. The TPMS sensors aren’t in the right place.

They apparently are the type of sensors that I can receive with my RTL-SDR as they drive by the house.

To get the car to register each sensor in the right place, I needed to tell it to relearn the IDs. I bought a little tool for $10 to trigger the sensors, but I apparently could have also done it by deflating the tires in turn to also trigger the sensor on demand.

Activate the Service Mode by pressing the Start button for 5 seconds with no foot on the brake.
On the driver’s display, select the Tire Pressure display, and click it to activate Relearn Mode. The horn chirps twice at the start, and the display says it’s active.
Start at the front left tire.
Place the relearn tool next to the sidewall near the valve stem and pointing the antenna toward the center of the wheel.
Press the button once and it’ll transmit for 10 seconds or so, to trigger the TPMS sensor.
The car chirps the horn when it registers the actiated sensor.
Go around to the others tires clockwise (front left, front right, back right, back left) activating each in turn. The car will chirp the horn as each sensor registers.
Done!