What Relearn Actually Does
The sensor in the wheel broadcasts its ID and pressure data over radio. The vehicle’s TPMS module only listens to IDs it has been taught. Swap a sensor without a relearn and the car either ignores it or throws a solid TPMS light. Relearn is simply the process of registering the new ID in the module’s memory.
Tools You’ll Need
- TPMS trigger/activation tool — must support 433 MHz. A 315 MHz tool will not wake these sensors.
- OBD-II scan tool — needed for the OBD relearn path; look for one with SPECTRE model coverage.
- Tire pressure gauge — set all four tires to the placard pressure before starting. Low pressure looks like a failed relearn.
- Optional magnet — a few older modules still use magnetic triggering.
Method 1: Stationary Relearn (Most Common)
This is what most shops do and what most owners can do at home.
- Inflate all tires to the placard value and park.
- Turn the ignition on, engine off. Leave doors closed.
- Hold the tool against the sidewall near the valve stem, starting at the left front.
- Trigger each sensor in the order the tool prompts — typically LF → RF → RR → LR.
- Wait for the confirmation: a horn chirp, a lamp flash, or a tool beep.
- Cycle the ignition off and back on, then check that the TPMS light clears.
Method 2: OBD Relearn
Use this when stationary relearn won’t stick, or after a module replacement.
- Plug the scan tool into the DLC under the dash.
- Select the SPECTRE model and the TPMS relearn function.
- Trigger each sensor when prompted so the tool can read its ID.
- Let the tool write those IDs to the module.
- Clear codes, then verify pressures read correctly on the tool’s live data screen.
Method 3: Auto Relearn (Drive Cycle)
Some SPECTRE modules learn on their own with no tool at all.
- Confirm pressures are correct.
- Ignition on for a few seconds, then start the engine.
- Drive above roughly 25 mph (40 km/h) for 10–20 minutes, including a few turns.
- The module picks up each sensor as the wheels rotate and clears the light.
Comparison at a Glance
| Method | Tool Required | Typical Time | Best Used When |
|---|---|---|---|
| Stationary | 433 MHz trigger tool | 2–5 min | Routine tire or sensor swap |
| OBD | Scan tool with OBD-II cable | 5–10 min | Stationary/auto relearn fails |
| Auto | None | 10–20 min driving | Confirming the job is complete |
Sensor Choice Matters
A pre-programmed sensor still needs a relearn to be registered — but it skips the bench-programming step entirely, which saves time on every install. The BL-ST-051 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Nio, Onvo | OE# P0242518, P0302230, P0385734 is a clamp-in, pre-programmed 433 MHz unit built by BH-Sens (Baolong Technology) and cross-referenced to OE numbers P0242518, P0302230 and P0385734. It fits Nio and Onvo applications, so it covers a range of vehicles sharing that same 433 MHz protocol.
| Attribute | Specification |
|---|---|
| Brand | BH-Sens (Baolong Technology) |
| Frequency | 433 MHz |
| Type | Clamp-in, pre-programmed |
| OE Numbers | P0242518, P0302230, P0385734 |
| Compatible Brands | Nio, Onvo |
| Dedicated OE Fitments | 6 vehicle applications |
Recommended Part
BL-ST-051 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Nio, Onvo | OE# P0242518, P0302230, P0385734 — 433 MHz BH-Sens TPMS sensor, pre-programmed and clamp-in, with six dedicated OE fitments across Nio and Onvo. Verify your valve stem style and frequency before ordering.
FAQ
Do I need a relearn after rotating tires on a SPECTRE?
Only if the module loses track of which sensor sits at which corner. A rotation that keeps sensors on their original positions usually needs nothing. Move a wheel to a different corner and the display locations will be wrong until you relearn.
What if none of the three methods work?
Check three things first: tire pressures are at placard, the tool is genuinely outputting 433 MHz, and the battery in the sensor is live (a brand-new sensor that won’t trigger is often a dead or counterfeit unit). If all three check out, the module itself may be at fault — pull codes before replacing parts.
Can I clone the old sensor ID instead of relearning?
Yes, cloning works on many vehicles and skips the relearn entirely. It’s only worth it if you have a tool that writes IDs and you’re replacing a single sensor. On a full set, a relearn is faster and less error-prone.