TPMS 50448 Plus 2-in-1 – TPMS Relearn Tool for GM & Ford with 315/433 MHz Sensor Activation

Brief Summary

The TPMS 50448 Plus 2-in-1 is a convenient TPMS relearn and activation tool for those working with tire pressure sensors on both GM series and Ford series vehicles. The tool combines the functions of popular EL-50448/EL-50449-like TPMS tools and can be used during tire changes, tire rotations, TPMS sensor replacement, or when the car displays a tire pressure warning after wheels have been moved.

What makes the 50448 Plus 2-in-1 extra practical is its ability to switch between GM mode and Ford mode. GM mode is used for vehicles such as Opel, Chevrolet, Buick, GM, and Cadillac, while Ford mode is used for Ford, Lincoln, and Mercury. You switch between brands by holding down the power button for approximately 3 seconds. The unit indicates the selected mode with an LED: green LED means GM mode, and red LED means Ford mode.

The tool is used by putting the car into TPMS learning/relearn mode, holding the antenna against the tire sidewall near the rim edge and valve, pressing the button, and waiting for the car's horn signal. Then, continue around the car in the correct order: front left → front right → rear right → rear left. Once all sensors are learned, the car typically confirms with two horn beeps.

Note: The tool requires one 9V battery to function. Check the battery's condition before use, as a weak battery can prevent sensors from activating correctly.

• Product: TPMS 50448 Plus 2-in-1
• Function: TPMS relearn / sensor activation
• Modes: GM mode and Ford mode
• GM series: Opel, Chevy/Chevrolet, Buick, GM, Cadillac
• Ford series: Ford, Lincoln, Mercury
• Battery: 1 × 9V battery required
• Wheel order: LF → RF → RR → LR

What is TPMS 50448 Plus 2-in-1?

The TPMS 50448 Plus 2-in-1 is an activation tool for tire pressure sensors used when the car needs to learn the sensors' positions. It is often referred to as a TPMS relearn tool, TPMS reset tool, or TPMS activation tool.

The tool is used when the car is already in TPMS learning mode. When you hold the tool's antenna near the tire sidewall by the valve and press the button, the tool sends an activation signal to the TPMS sensor. The car then receives the sensor's ID and stores it at the correct wheel position.

This model is extra flexible because it has two modes: one for the GM series and one for the Ford series. This makes it useful for both private individuals who change wheels themselves and workshops that handle multiple car brands.

When do you need a TPMS relearn tool?

A TPMS relearn is necessary when the car's control system no longer knows which tire pressure sensor is on which wheel. This is common after wheel work or sensor replacement.

• After tire rotation: when the wheels have been moved between positions.
• After wheel change: for example, switching between summer and winter tires.
• After TPMS sensor replacement: when a new sensor has been installed in a wheel.
• Upon tire pressure warning: if the TPMS light is on after a wheel change despite correct air pressure.
• If incorrect wheel position: if the car displays the pressure value for the wrong wheel on the display.

Advantages of the 2-in-1 solution

• Two brand modes in the same tool: GM and Ford.
• Simple LED indication: green LED for GM and red LED for Ford.
• Convenient for wheel changes: especially for summer/winter wheels.
• Portable format: easy to keep in a toolbox or service vehicle.
• Practical for workshops: reduces the need for separate TPMS activation tools.
• Easy to use: car is put into relearn mode and sensors are activated in the correct order.

GM mode and Ford mode

GM Mode

GM mode is intended for the GM series, according to the product text, for example:

• Opel
• Chevy / Chevrolet
• Buick
• GM
• Cadillac

Ford Mode

Ford mode is intended for the Ford series, according to the product text, for example:

• Ford
• Lincoln
• Mercury

Exact compatibility depends on the car model, year, market, and the TPMS procedure the car uses. Always check the car's manual if you are unsure.

How to switch between GM and Ford

According to the product information, you switch between GM and Ford modes as follows:

1. Hold down the power button for approximately 3 seconds.
2. The two LEDs will flash 2 times.
3. The LED for the selected brand will then flash 2 times.
4. The tool is now in the selected mode.

Tip: Always check the mode before starting the relearn procedure. The wrong mode can prevent the car from responding when you try to activate the sensor.

How to check the selected mode

Briefly press the power button and observe the LED indication:

TPMS relearn on GM series

For GM series, the car's menu/display is normally used to start the TPMS learning mode. According to the product text, you do this as follows:

1. Place the gear selector in P.
2. Use the car's menu/cruise/display buttons to select TPMS re-learn mode in the instrument panel settings.
3. The car confirms with two horn beeps.
4. The TPMS indicator will flash.
5. If the car has a message center, it may show front left (LF).
6. Then proceed with sensor activation using the tool, starting with the front left wheel.

TPMS relearn on Ford series

For Ford series, an ignition and brake pedal procedure is often used to start TPMS training mode. According to the product text:

1. Place the gear selector in P.
2. With the ignition in OFF: press and release the brake pedal.
3. Turn the ignition from OFF to RUN 3 times and end in RUN.
4. Press and release the brake pedal.
5. Turn the ignition to OFF.
6. Turn the ignition from OFF to RUN 3 times again and end in RUN.
7. The horn will sound once and the TPMS indicator will flash when learning mode has been activated.
8. If the car has a message center, it may show front left (LF).

If your Ford model has a different procedure in the owner's manual, the car's instructions should be followed.

Correct wheel order

When the car is in relearn mode, the sensors should normally be activated in the following order:

Once all sensors have been relearned, the car should normally give two horn beeps and the TPMS relearn is complete.

Practical use of the tool

1. Insert a fresh 9V battery.
2. Check that the tool is in the correct mode: GM or Ford.
3. Put the car into TPMS learning/relearn mode.
4. Start at the front left wheel.
5. Hold the antenna upwards against the tire sidewall, near the rim edge by the valve area.
6. Press and release the button on the tool.
7. Wait for the car's horn signal.
8. Continue to the next wheel in the order LF → RF → RR → LR.
9. Once the last sensor is learned, the car typically confirms with two horn beeps.

Placement is important: If the car doesn't respond, move the tool slightly around the valve area and try again. Keep the tool close to the tire sidewall, not far from the wheel.

Important tips

• Ensure you have selected the correct mode before starting: green LED for GM, red LED for Ford.
• Use a fresh 9V battery. A weak battery is a common reason why sensors do not activate.
• Hold the tool close to the tire sidewall by the valve and rim edge.
• Move quickly to the next wheel after the car confirms with a horn signal.
• Always follow the car's owner's manual if the procedure differs from this guide.
• Manually check tire pressure after a wheel change – TPMS does not replace a proper tire pressure gauge.

Troubleshooting

The car does not react when I activate the sensor

• Check that the car is indeed in TPMS relearn mode.
• Check that the tool is in the correct mode: GM or Ford.
• Replace or check the 9V battery.
• Hold the tool closer to the valve/rim edge.
• Try moving the tool slightly around the tire sidewall at the valve.

The wrong LED mode is selected

• Hold down the power button for approximately 3 seconds.
• Wait until the LEDs flash.
• Briefly press the power button to check the mode: green = GM, red = Ford.

The car exits relearn mode before all wheels are complete

• The procedure may have a time limit.
• Start over from the beginning.
• Move more quickly between wheels after each horn signal.
• Follow the exact wheel order.

The TPMS light is still on after relearn

• Check the air pressure in all tires.
• A sensor may be faulty or have a dead battery.
• Universal sensors may need to be programmed with a separate TPMS programmer before relearn.
• The car may need to be driven a short distance to update pressure values.
• There may be a stored TPMS fault requiring a diagnostic tool.

Incorrect wheel position shown on the display

• The learning process was likely done in the wrong order.
• Repeat the procedure, always starting at the front left.
• Follow the car's turn signals/message center if the car indicates the next wheel position.

Specifications

Package contents

• 1 × TPMS 50448 Plus 2-in-1 Relearn Tool

Note: 1 × 9V battery is required for use. Check if a battery is included in your specific delivery.

FAQ – Frequently asked questions

1) What is TPMS 50448 Plus 2-in-1?

It is a TPMS relearn and activation tool for both GM series and Ford series.

2) Which car brands are supported?

According to the product text, the GM series is supported, for example, Opel, Chevrolet, Buick, GM, and Cadillac, as well as the Ford series, for example, Ford, Lincoln, and Mercury.

3) How do I switch between GM and Ford?

Hold down the power button for approximately 3 seconds until the LED indication shows the selected mode.

4) How do I see which mode the tool is in?

Press the power button. A green LED means GM mode, and a red LED means Ford mode.

5) Which battery is needed?

The tool requires one 9V battery.

6) Does the tool program new TPMS sensors?

It is primarily a relearn/activation tool. Universal sensors may need to be programmed with a separate TPMS programmer first.

7) When do I need to use the tool?

After tire change, tire rotation, TPMS sensor replacement, or when the car displays a TPMS warning after wheel work.

8) Which wheel order should I follow?

The standard order is left front, right front, right rear, and left rear.

9) How do I know that a sensor has been read?

The car normally confirms with a horn signal. After the last sensor, the horn usually sounds twice.

10) Where should I hold the tool?

Hold the antenna close to the tire sidewall near the rim edge and valve area.

11) Why does nothing happen when I press the button?

Make sure the car is in relearn mode, that the correct GM/Ford mode is selected, and that the 9V battery is in good condition.

12) Does it work on Opel?

Opel is mentioned in the GM series according to the product text, but exact support depends on the model, model year, and TPMS system.

13) Does it work on Ford?

Yes, the Ford series is explicitly mentioned in the product information.

14) Does the car have to be in P mode?

Yes, the product text specifies P mode for both the GM and Ford procedures where relevant.

15) Does the tool replace a tire pressure gauge?

No. Always check tire pressure manually with a proper tire pressure gauge.

Notes & Safety

• Always manually check tire pressure after a wheel change.
• TPMS is an aid and does not replace regular checks of tire condition and air pressure.
• Follow the car's owner's manual if the procedure differs from this guide.
• Ensure the 9V battery is in good condition before use.
• If the TPMS light continues to illuminate after a correct relearn, sensors or the system may need to be troubleshooted with a diagnostic tool.
• Aftermarket and universal sensors may need to be programmed before relearn.

Summary

TPMS 50448 Plus 2-in-1 is a smart and portable TPMS tool for both GM and Ford series. With easy mode switching, LED indication, and support for the standard procedure left front → right front → right rear → left rear, the tool makes TPMS relearning significantly easier after tire changes, tire rotations, or sensor replacements.

For those who work with both GM-based vehicles and Ford-based vehicles, the 50448 Plus 2-in-1 is a practical choice as it eliminates the need for two separate relearn tools in many situations. Remember to use a fresh 9V battery and always follow the car's own TPMS procedure.