How will the vehicle relearn the new sensors? Once your tires are equipped with new TPMS valves, your car must recognize the sensors and establish a communication in between the sensors and the reading device of the computer. This will ensure that the central unit measuring data is activated every time there is a new code generated by a sensor, or when there is a change in the positioning of a tire.
Depending on the brand of the car, there are three different ways to make the vehicle recognize the new sensors:
- Autoformation / Autolearning - When the car is driven for at least 10 minutes between 35 and 100 km/h, it recognizes the new valves automatically. The TPMS light in the dash shuts off by itself once all the sensors are read correctly. We find this process in brands like Mercedes, Volkswagen, Ford, Mazda, or Hyundai.
- Manual relearning / Stopped relearning - This is when a fix procedure with an activation tool that does not require the car to be driven in order to see the TPMS valves. We find this process on brands like Audi, Mercedes, BMW, or Porsche.
- Activated diagnostic interface (OBD II) / Programmed relearning - As explained above, the sensors will require a specific tool the establish a communication with the diagnostic interface in cars like Toyota, Lexus Nissan or Honda. The OBD II can also be used to diagnostic the reasons why the TPMS light is on.
If ever the programming is not being completed for whatever reasons or simply not made at all, it can lead to incorrect indications of tire pressures and system failures. Each car manufacturer has a detailed learning process for TPMS that must be followed properly in order to get a fully working system.
Please note that for some manufacturers, not having TPMS or having defective TPMS can not only indicate a wrong tire pressure, but it can also have an impact on the activation of your ABS system or traction control system.
TPMS dash light
If the light turns on and stays on when you are driving:
You have at least 1 tire with incorrect air pressure in it. Make sure that all 4 tires are inflated correctly, the light will turn off.
If the TPMS light blinks:
This means your tires are approaching the of their lowest limit (20% less inflated than recommanded pressure). This situation is usually caused by the variations of ambiant temperature.
If the light blinks when starting the car and remains turned on when you drive:
You have one or many defective sensors. Make sure to unmount the tires and rim, pull-out the defective TPMS, and bring it to a specialist to correct the mistake. If the sensor is defective, look at your tire pressure manuallybefore driving by precaution.
Please note that TPMS sensors are only useful to warn you about the deflation of your tires, and not the opposite. Here are the effects of having an over inflated tire:
- Bumps and potholes seem more sensative.
- The tread wears faster, especially in its center.
- Bad performance of the car due to a lack of grip of the tire.