Understanding UNI-T TPMS Relearn
The UNI-T uses a direct TPMS system where each wheel sensor broadcasts a unique ID. When you swap a sensor—especially with a pre-programmed unit like the BL-ST-089 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Avatr, Changan, Deepal, Mazda, Nevo & 1 More | OE# 3601010CD01, 3601010DG01, 3601010MK02—the vehicle’s ECU needs to learn the new IDs. Skipping this step leaves the TPMS light on and disables the low-pressure warning.
Which Relearn Method Works for Your UNI-T?
Not all UNI-T models support every method. Use this table to confirm compatibility:
| Relearn Method | Tool Required | Time Required | Best For |
|---|---|---|---|
| Auto Relearn | None (just driving) | 10–20 minutes | 2021+ UNI-T, Avatr, Deepal models |
| OBD Relearn | Autel TS508, Bartech, or equivalent | 2–5 minutes | All UNI-T variants (most reliable) |
| Stationary Relearn | TPMS magnet (or strong rare-earth magnet) | 10–15 minutes | Older UNI-T, Changan, Mazda models |
Step-by-Step: Auto Relearn (No Tools)
- Park the vehicle on a level surface. Ensure all tires are at the correct pressure (check the driver’s door sticker).
- Start the engine and drive above 25 mph (40 km/h) for 10–15 minutes.
- The TPMS light should turn off after 5–10 minutes of steady driving. If it stays on, try another method.
Note: Auto relearn works only if the vehicle has been stationary for at least 20 minutes before driving. It does not work if you’ve just swapped sensors while the engine was off.
Step-by-Step: OBD Relearn (Recommended for Accuracy)
This method works on all UNI-T, Avatr, Changan, Deepal, and Mazda models using the 433MHz BH-Sens sensors.
- Connect your OBD TPMS tool to the vehicle’s OBD-II port (under the dashboard, driver’s side).
- Select “UNI-T” (or “Changan” if UNI-T isn’t listed—they share the same TPMS protocol).
- Choose “Relearn” or “Sensor ID Learning.”
- Follow the tool’s prompts: It will trigger each sensor in sequence (LF, RF, RR, LR). The tool’s antenna must be held near the valve stem.
- Once all four sensors are learned, the tool will confirm “Relearn Complete.” The TPMS light will turn off when you start the engine.
Step-by-Step: Stationary Relearn (Magnet Method)
Use this only if you don’t have an OBD tool and your UNI-T supports it.
- With the engine off, set the parking brake.
- Hold a TPMS magnet (or a strong neodymium magnet) directly against the valve stem of the left front tire. The horn will chirp once.
- Repeat for the right front (horn chirps twice), right rear (three chirps), and left rear (four chirps).
- After the last chirp, the system enters learning mode. Start the engine. The TPMS light should go out within 2 minutes.
Note: If the horn doesn’t chirp, your UNI-T model does not support stationary relearn—use the OBD method instead.
Recommended Part
For a direct-fit replacement on UNI-T and compatible Changan-platform vehicles, use the pre-programmed BL-ST-089 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Avatr, Changan, Deepal, Mazda, Nevo & 1 More | OE# 3601010CD01, 3601010DG01, 3601010MK02. It comes with the correct 433MHz frequency and OE fitment—no additional programming needed before the relearn.
FAQ
How do I know if my UNI-T sensor needs a relearn or just a reset?
If you replaced a sensor, you must do a relearn (the ECU must learn the new ID). If you only rotated tires or replaced a battery, a simple reset (auto relearn while driving) usually works. The TPMS light flashing at startup vs. staying solid indicates a sensor fault vs. a learning issue.
Can I use a universal sensor instead of the BH-Sens BL-ST-089?
Yes, but you’ll need to program the universal sensor with the correct ID (using a TPMS tool) before the relearn. The BH-Sens unit is pre-programmed with the correct ID for UNI-T, saving you the programming step.
Why won’t my UNI-T auto relearn complete after 20 minutes of driving?
Common causes: One or more sensors are not transmitting (dead battery, damaged sensor), or the vehicle sat for less than 20 minutes before you started driving. Also, some UNI-T models (especially 2020–2021) require the OBD method exclusively—check your owner’s manual.
Do I need to relearn after replacing the TPMS sensor battery?
If you replace the battery in a BH-Sens sensor (not recommended—sensors are sealed), the sensor retains its ID and no relearn is needed. But if you replace the entire sensor unit, a relearn is mandatory.