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Discussion Starter · #1 ·
Hey i recently changed the tires on my 2016 smart fortwo and i put in new TPMS sensors in them but mavis was unable to put the car in relearn mode to program them.

How can i put the car in relearn mode so the TPMS light goes off?
Ive driven the car about 1,000 miles so far and it didnt auto relearn so that isnt an option
Warning light just keeps saying that the sensors are missing and isnt being read
 

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Did you use the control on the left side of the steering wheel to go to the last screen on the info cluster and select the option to tell the system to use the new tire pressure? Also, wonder why you changed out the sensors? The batteries in them should be good for several more years. I have one car with 17 years on the original sensors and another with 14 years on the original sensors. Both still function properly.
 

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Discussion Starter · #3 ·
Did you use the control on the left side of the steering wheel to go to the last screen on the info cluster and select the option to tell the system to use the new tire pressure? Also, wonder why you changed out the sensors? The batteries in them should be good for several more years. I have one car with 17 years on the original sensors and another with 14 years on the original sensors. Both still function properly.
I havent tried the info cluster yet, but one of my sensors went out because i always get a inoperation message for my sensor and it was the rear passenger side that went out so i replaced all 4 of them
 

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I havent tried the info cluster yet, but one of my sensors went out because i always get a inoperation message for my sensor and it was the rear passenger side that went out so i replaced all 4 of them
Ok, that makes sense but you do have to “tell” the system to learn the “new” tire pressures. There is also the obvious, were the correct frequency sensors installed?
 

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Discussion Starter · #5 ·
Ive tried to use the control on the left side to restart the tire monitor system, light goes off for a few miles and comes back on. The sensors thats on them now are 407009322R
 

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Unfortunately, I don’t have any further recommendations. Since I’ve not had an issue with my sensors in the almost 6 years of ownership and they were still working properly when I changed out the tires last year I’ve not researched what to replace them with.
 

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Viper…

Pressing the TPMS button should reset the system if everything is working properly. I suggest checking the tires to make sure they are all at the correct pressure, then trying the reset again.

If they don’t reset, made sure all of your car’s lights are off if you have made any updates to LEDs. Sometimes LEDs can cause radio interference that will prevent the receiver from working properly.

You might want to try taking your car a few dozen yards away from other vehicles, particularly when trying the reset button. In some cases, transmitters from other cars can cause interference.

If still no luck, Walmart or other tire center should be able to check to see if the radio transmitters in the tires are all working properly. Loss of the radio signal from one or more sensors will cause the TPMS light to come on again.

If you had service recently, I would think whomever did the service should fix the sensors.
 

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Discussion Starter · #8 ·
any other advice? i reset them from the dashboard and the light goes away but comes back within minutes of driving saying the sensor is missing
 

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My guess is that you actually have a faulty sensor then. They have lithium button batteries inside with a “shelf life” of about 10 years. However, that does not mean the batteries will run for 10 years. They can be depleted considerably more rapidly if used frequently. Plus, there is no way of knowing how long your TPMS sensors lingered on a shelf before installation.

At this point, you may want to take your car to a tire shop that has a receiver that can check to see if the TPMS sensors are still transmitting.

If all are working and at full strength, it isn’t beyond the realm of belief that your car’s TPMS radio receiver is flaky.

I went through similar circumstances trying to troubleshoot my 2008 Passion a few years ago. After replacing my TPMS receiver (I still have the original), I was able to determine that radio interference from recently installed LED bulbs was the culprit.

I hope this helps.
 

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I have one bad sensor on my cabriolet, but I have no plans to get it fixed. Not worth the $50 or so and time at the shop. I've been checking my own tire pressures for fifty years and I plan to continue that approach. I hate being forced to buy electronics on cars that I have no need or use for.

Len
 
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