Why Chrysler TPMS Relearn Is Different
Chrysler’s TPMS system uses direct pressure sensors in each wheel. After you replace a sensor, rotate tires, or replace a battery in the sensor, the vehicle’s ECU loses track of which sensor is in which position. Without a relearn, the TPMS light stays on and pressure readings may be inaccurate or missing.
Chrysler vehicles (including Chrysler, Dodge, Jeep, and Ram) use a unique sensor ID registration process. Unlike some Asian brands that auto-learn sensor IDs instantly, Chrysler requires either a drive cycle (auto relearn) or a tool-assisted relearn. The specific method depends on the model year and trim level.
Tools Needed for Chrysler TPMS Relearn
| Tool | Purpose | Notes |
|---|---|---|
| TPMS activation tool (e.g., Autel TS508, Bartec Tech400SD) | Triggers each sensor to send its ID | Required for OBD relearn; some stationary relearn procedures also need it |
| OBD2 scanner with TPMS function | Uploads sensor IDs to ECU | Needed for OBD relearn on 2014+ models |
| Magnet (strong rare-earth type) | Wakes sensor in stationary relearn | Only for models that support magnet-based relearn (2007–2012) |
| Tire pressure gauge | Verify pressures before starting | All tires must be at proper pressure (usually 32–38 PSI) |
| Vehicle owner’s manual | Confirm relearn method for your year/model | Chrysler changed procedures several times across generations |
Important: If you are installing a new sensor like BL-ST-046 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Hongqi | OE# 3778080HA01, it must be pre-programmed with the correct frequency (433MHz for most Chrysler models) and compatible with Chrysler’s protocol. BH-Sens sensors from Baolong Technology are cloned to OE specifications, so they work with Chrysler’s system without additional programming.
Three Chrysler TPMS Relearn Methods
1. Auto Relearn (Drive Cycle Method)
This is the simplest method—no tools required. However, it only works on certain Chrysler models (typically 2010–2020 cars, minivans, and SUVs).
Procedure:
- Set all tires to the recommended pressure (check door jamb sticker).
- Drive the vehicle above 20 mph for at least 10 minutes in a straight line.
- Continue driving for another 10–20 minutes with occasional turns (left and right).
- The TPMS light should turn off after the system recognizes all four sensor IDs.
When it works: On models with “auto relearn” capability, the system learns sensor positions by monitoring wheel speed sensors and sensor signal strength during driving.
When it fails: If the light stays on after 30 minutes of driving, the vehicle likely requires a tool-based relearn. Older Chrysler models (pre-2008) and some performance models do not support auto relearn.
2. OBD Relearn (Tool-Assisted)
This is the recommended method for most Chrysler vehicles from 2014 onward. It requires a TPMS tool that can both activate sensors and write IDs to the ECU via the OBD2 port.
Procedure:
- Connect the TPMS tool to the OBD2 port (under the dashboard, driver’s side).
- Follow the tool’s prompts to select “Chrysler” and the correct model year.
- Activate the left front sensor by holding the tool near the tire sidewall (where the valve stem is located). The tool will beep or display “OK” when the sensor responds.
- Repeat for the right front, right rear, and left rear sensors in that order.
- The tool will upload the sensor IDs to the ECU automatically.
- Disconnect the tool and start the engine. The TPMS light should go out within 30 seconds.
Note: Some Chrysler vehicles (like the 300, Pacifica, and Grand Cherokee) require the ignition to be in the “ON” position (engine off) during the OBD relearn. Check your tool’s instructions.
3. Stationary Relearn (Magnet Method)
Older Chrysler models (2007–2012) and some commercial vehicles use a magnet to trigger a relearn. This method does not require an OBD tool, but you need a magnet and a TPMS activation tool.
Procedure:
- Turn the ignition to the “ON” position (engine off).
- Using a TPMS tool, activate the left front sensor. Hold the tool at the valve stem until the horn chirps once.
- Move to the right front sensor. Activate it—horn chirps once.
- Right rear sensor—horn chirps once.
- Left rear sensor—horn chirps once.
- After the fourth sensor, the horn should chirp twice, confirming the relearn is complete.
- Turn the ignition off, then start the engine. The TPMS light should be off.
Why a magnet? On these models, the magnet technique (placing a strong magnet over the valve stem) is an alternative to the TPMS tool. However, most modern tools include a magnet function that works identically.
Important: This method only works if the sensors are already transmitting (i.e., new sensors must be activated first). If you are installing BL-ST-046 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Hongqi | OE# 3778080HA01, ensure it is pre-programmed and ready to transmit on 433MHz.
Common Chrysler TPMS Problems and Solutions
| Problem | Likely Cause | Fix |
|---|---|---|
| TPMS light blinks then stays on | Sensor battery dead or sensor damaged | Replace sensor; use pre-programmed unit like BH-Sens |
| Light stays solid after relearn | Incorrect sensor IDs or wrong frequency | Verify sensor is 433MHz; re-run OBD relearn |
| Horn chirps but light stays on | Relearn sequence interrupted | Repeat procedure from start, ensuring correct order (LF, RF, RR, LR) |
| No sensor detected during activation | Sensor not installed correctly or defective | Check sensor torque (8–12 Nm); try new sensor |
Recommended Part for Chrysler TPMS Replacement
If you need a replacement sensor for a Chrysler vehicle that uses 433MHz sensors (most models 2008–2020), consider the BH-Sens TPMS Sensor (SKU: BL-ST-046). This clamp-in sensor is pre-programmed to OE specifications and fits Hongqi applications—but its 433MHz frequency and Baolong Technology internals make it compatible with many Chrysler systems that use the same frequency band.
Always verify your vehicle’s frequency (check the old sensor or owner’s manual) before purchasing. For Chrysler, 433MHz is the standard, but some 2005–2007 models use 315MHz.
FAQ
How do I know which relearn method my Chrysler uses?
Check your owner’s manual under “Tire Pressure Monitoring System.” If you don’t have the manual, look for the TPMS relearn procedure online using your VIN. Generally: 2007–2012 models often use magnet/stationary relearn; 2013–2020 models use auto relearn or OBD relearn; 2021+ models exclusively use OBD relearn.
Can I reuse a TPMS sensor after a battery change?
No—Chrysler TPMS sensors have non-replaceable batteries. Once the battery dies (typically after 5–7 years), the entire sensor must be replaced. Pre-programmed sensors like the BH-Sens BL-ST-046 are drop-in replacements that do not require additional programming.
Why does my TPMS light come back on after a relearn?
The most common causes are: (1) a sensor is failing or has a dead battery, (2) tire pressure is not set correctly before the relearn, or (3) the relearn sequence was interrupted (e.g., you missed a sensor or activated them in the wrong order). Re-check all pressures, then repeat the relearn procedure carefully.
Do I need a special tool to program a new TPMS sensor for Chrysler?
If you buy pre-programmed sensors (like the BL-ST-046), you do not need to program the sensor itself—only the vehicle needs a relearn to register the new sensor IDs. For OBD relearn, you need a TPMS tool that can write IDs to the ECU. For auto relearn, no tool is needed. For stationary relearn, a simple activation tool (or magnet) suffices.