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Probably because the system lost respons from one of your tmps sensors ... the tractioncontrolsystem requires the sensors to respond. Shutting down the tractioncontrolsystem is actually a safetyfeature because if it where to respond i could behave eratically because of the misding data
Roy, here's something you can try. Sometimes, when you air the tires up to around 40 PSI and drive for several miles it will reset. If it doesn't reset then you'll need to find out if you have a bad tire pressure sensor OR something else wrong with the system. Hope this helps and please visit my auto-repair-website at: http://www.bigasautorepair.com/
If just the tires were changed and you still have the original rims on the vehicle then you may just have a bad pressure sensor in on of the rims or the system may need to be reprogammed to recognize the sensors. If the RIMS were also changed then the replacement rims may not have the pressure sensors in them in which case the light will always be on since the system is always looking for pressure sensor signals that aren't there. If the rims were replaced and don't have the sensors you can purchase and install new sensors in these rims and program them so the system will recognize them.
The new sensor I.D.'s will need to be programmed into the TPMS system. You could spend a couple of thousand dollars to get the tools to do this or call around some local shop or the dealer to see what the get for this. Then next summer you get to reprogram them again.
The other option is to pull 2 TPMS sensors out of your summer tires and install them into your winter wheels. Use a TPMS service kit to seal them up. You won't need to reprogram anything if you go this route.
The third option is not to worry about it. The old fashioned way of doing things was to check your tires every couple weeks for proper inflation. If you are in tune with the way your vehicle handles than you should be able to notice the change in the handling characteristics as a tire goes low. After all we survived for 100 years without TPMS.
Check your tire pressure, and adjust as necessary first.
Next, have you changed anything having to do with the rims/tires/valve stems? The valve stems mounted in your factory rims have a tire pressure monitoring sensor/transmitter mounted on the inside. The valve stem itself is the antenna for the transmitter. If you have had the valve stems, valve cores, or even the valve caps replaced, that can cause a fault in the system.
Also if you used a canned flat repair like 'Fix-A-Flat', that could be clogging the sensor. I don't recommend using fix-a-flat on tires with TPMS, but if you're in a jam, sometimes you have to.
If you had the tires changed, the shop has to be careful when mounting and dismounting the tires. The sensors are easy to damage with tire tools.
In order to reset the TPMS, there is a small button either in the glove compartment, or under the steering wheel. Turn the ignition to the 'on' position without starting the engine. Press and hold the button for approximately three seconds. The light will begin flashing. Release the button and wait at least 7 seconds for the system to relearn the sensors. Then turn the key to the 'off' position. Start the engine, and check that the light turns off after about a second.
If the light still stays on, you need to have the TPMS serviced by a qualified mechanic. This should be either a Toyota dealer, or a shop that uses the appropriate TPMS testing equipment.
I need to replace all 4 tpms on my 07 jeep compass. I am trying to keep the cost down. If I buy after market sensors do I need to go back to jeep to program them? help
Without the sensors, the lights will continue to warn you your pressure is low. No harm will come from this to your vehicle. It is a safety system to warn you about the tire pressure so you will take immediate action. The manufacturer is ramping up to meet requirements for future safety regulations.
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