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What is TPMS

Tire Pressure Monitoring System – monitor the air pressure of a vehicle’s tires and report this information in real time to the driver. It is designed to alert driver to check tire pressure by signaling a low pressure light, some advanced system can even display tire pressure in PSI on the dashboard. TPMS is definitely the one of most critical parts of a vehicle’s safety system.

Wiki-definition
A tire-pressure monitoring system (TPMS) is an electronic system designed to monitor the air pressure inside the pneumatic tires on various types of vehicles. TPMS report real-time tire-pressure information to the driver of the vehicle, either via a gauge, a pictogram display, or a simple low-pressure warning light. TPMS are provided both at an OEM (factory) level as well as an aftermarket solution. The target of a TPMS is avoiding traffic accidentspoor fuel economy, and increased tire wear due to under-inflated tires through early recognition of a hazardous state of the tires.

How TPMS Works?
Direct TPMS uses a sensor mounted in the wheel to measure air pressure in each tire. When air pressure drops 25% below the manufacturer’s recommended level, the sensor transmits that information to your car’s computer system through ECU and triggers your dashboard indicator light.

List of Components

  • Tire pressure monitoring sensor
  • TPM warning light on dashboard
  • ECU – electrical control unit
What is TPMS Relearn

It is a pairing process to let car’s ECU (electronic control unit) register new sensor’s ID and location, so the electronic system can verify to accept data transmitted from paired sensors only.

All replacement sensors are required to be paired to vehicle by following standard relearn procedure specified by vehicle manufacturers. There are 3 types of relearn method are commonly used, please click on following links for more information.

Visit Relearn Library
Difference between Pre-programmed and Blank sensors

Pre-programmed sensor is ready to pair with vehicle as the communication protocol has been programmed into sensor’s flash drive. All that’s left to do is to pair the sensor to car’s ECU by performing standard relearn procedure.

Blank Sensor requires a TPMS programmer or programming-able servicing tool to write the vehicle specific protocol/software into sensor’s flash drive. Car’s ECU will not detect or recognize the sensor that has not been programmed.

What's the difference between Left & Right sensors?

When seeing pre-programmed sensors that labeled with L or R at the end of part number, it tells you which side of the car you should install the sensor onto.

Especially for cars that equipped HIGH LINE TPM system, installing sensors on right side of the car is even more critical so that the tire pressure and tire location can be displayed accordingly on dashboard.

The left and right specific rule only applies to following part numbers,
MOREsensor UNI-Series universal sensor
MOREsensor UNI-Series pre-programmed sensor
TX-P001
TX-P002
TX-P003
TX-P004
TX-SxxxL (pre-programmed sensor part number, starts with TX-S)
TX-SxxxR (pre-programmed sensor part number, starts with TX-S)

Where do I find sensor ID?

All MOREsensor branded tire sensors ARE NOT label with sensor’s ID as our product is reprogrammable. You will need a TPMS scanner to read sensor ID.

Any numbers you locate from the sensor body is NOT sensor ID.

Ways to read or retrieve sensor OD.

  1. Use scanner to read pre-programmed sensor
  2. Use programmer to program blank sensor, ID will be shown at the end of programming session
  3. Use OBD2 scanner or reader to retrieve sensor IDs stored in the ECU
My tool is not reading MOREsensor

Reasons may vary, we summed up the most common scenarios as follows.

  1. The tool used has not been updated for more than a month. Keep in mind that all tool manufacturers are constantly updating vehicle data and relearn software on a monthly basis, an outdated software/firmware can lead to all kinds of programming error and relearn failure.
  2. Incorrect vehicle model, make and year was selected when trying to trigger or read TPMS sensor(s). It’s very common for car owners to misidentify their vehicle model or production year, the best way to verify such information is through performing a VIN (vehicle identification number) lookup.
  3. Incompatible radio frequency. There are 2 major radio frequencies used for tire sensor to communicate with ECU (electronic control unit), 315 MHz and 433 MHz. Some car makers switch the frequency from one to another after redesigning an active model during same production year. Please simply scan the factory sensor to verify frequency if you have a TPMS servicing tool or scanner. Or you can contact car dealer or local professional to verify the information for you.
Learn More
Is tire sensor replacement DIYer friendly

Generally speaking, TPMS maintenance and repair require decent level of knowledge, experience, skills and special tool/device to perform the task. Most of the mechanics and technicians from tire shops aren’t trained properly or lacking ability to troubleshoot TPMS. We recommend getting your sensors replaced and paired by certified service that specializes in tire sensor replacement and TPMS reset.

How to program / reprogram MOREsensor

First thing first, you need a programmer that is compatible with our sensor

Reminder – 
Always update your tool before programming or at least once every month as tool manufacturer normally update software/firmware and vehicle data quite frequently.

  • ATEQ VT55 / VT56
  • Mobiletron PT46 / PT47 — BUY NOW
  • Matco MD56 / MAXTPMS
  • Monster MST TPMSPRO
  • NAPA 92-1551 / 92-1541
  • SMP T56000 / T46000
  • SNAP-ON TPMS4
  • TECH TECH56

All the tools listed above support wireless programming, please select “Combi Sensor” under brand “Mobiletron” for sensor type option.

TPMS light still illuminates after sensor replaced and relearned

If you’re seeing low pressure light on after sensor replacement, your TPMS is most likely failed to communicate with the new sensor(s). It is possible that the sensor(s) wasn’t installed or paired properly. See following common scenarios and consult us for further assistance.

  • Bought sensor(s) in wrong frequency
  • Mistaken about vehicle model year
  • Your vehicle trim level is not compatible
  • An outdated scan tool or OBD diagnostic tool was used
  • Incorrect relearn procedure was taken
Learn More
Low Line TPMS vs. High Line TPMS

Low Line TPMS uses a symbolic light to alert driver when system detects low pressure

High Line TPMS displays real-time tire pressure from each tire location to notify driver

How to inspect new sensor before installation
  1. First thing first, you have know the correct vehicle information (make, model and year) and what radio frequency the vehicle utilizes.
  2. A TPMS servicing tool or scanner is required to perform compatibility check
  3. Pre-scan the new sensor
    if your tool/scanner is able to read the sensor when set to vehicle specific, that means the sensor is programmed properly with correct protocol. The other way around, do not even attempt to install the sensor because it’s most likely going to fail.
Can MOREsensor be reprogrammed or modified

Yes you can!

With our universal programmable tire sensor, you will be able to reprogram it as long as you have one of the following compatible tools.

    • ATEQ VT55 / VT56
    • Mobiletron PT46 / PT47
    • Matco MD56 / MAXTPMS
    • Monster MST TPMSPRO
    • NAPA 92-1551 / 92-1541
    • SMP T56000 / T46000
    • SNAP-ON TPMS4
    • TECH TECH56
How long does MOREsensor last

The average lifespan of MOREsensor TPMS sensor is roughly around 8-10 years according to 12000-15000 miles of driving per year.

Should I put new tire sensor when installing new tire?

Not necessary.

However, it’s very common to damage tire sensor during tire or wheel replacement due to careless handling. Any custom sized or oversize wheel can cause a sensor be harder to fit, there a decent change that you will need new sensor when installing new tires if the factory sensor can’t fit the new wheel or tire.

What’s the difference between a steady and flashing TPMS light

If the TPMS light comes on and stays on, one or more of the tires has low pressure and needs to be inflated to the placard pressure. 

If the TPMS light flashes, one or more of the sensors is not communicating with the vehicle.

The sensor could be damaged or have a dead battery. OE TPMS sensors typically last 7-10 years. If the vehicle is in this year range with one dead battery, the rest are likely to die soon.

If one or more of the sensors needs to be replaced, the test features found on some TPMS scan tools can help identify which sensor is bad. 

Knowing the status of each sensor will help you determine the service plan before breaking down the tires.

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