Check TMPS light on.

[skipgen]

What’s the most likely failure point - sensors?

 

[Suburbazine]

What’s the most likely failure point - sensors?

Antennas in rear wheel wells or potentially the battery in a tire sensor dropping out while driving.
Oh, and local interference on the radio spectrum the system uses will do it too.

 

[skipgen]

Antennas in rear wheel wells or potentially the battery in a tire sensor dropping out while driving.
Oh, and local interference on the radio spectrum the system uses will do it too.

Yeah… it was doing it intermittently for about a day and then stayed on. Looks like it’s time for a new set of sensors. If one’s going “bye-bye”, the others aren’t far behind.

Do they require any special programming?

 

[dfyffe]

Yeah… it was doing it intermittently for about a day and then stayed on. Looks like it’s time for a new set of sensors. If one’s going “bye-bye”, the others aren’t far behind.

Do they require any special programmIng

Based on my experience , they will need programming. I've enquired a few chain tire shops and they all say yes. Mavis Tire quoted $60 per sensor, I have also got up to $80 per sensor from other tire shop.

 

[dfyffe]

I just had an experience with my car TPMS, In Dec 2022 the TPMS light popped up on my dash, using my Diag Pro Scan Tool, it indicated the right rear sensor failed. I called my extended warranty company and surprisingly was told its covered, I took the car to a hyundai dealer to get it replaced, I explained to them that it is recommended that all 4 should be replaced. Later in the day I got a call from the dealer CSR saying, the warranty company will only approve replacement of the failed one. They replaced it, pick up the car and on my way home the TPMS light popped up again, checked again showed right rear failure, After telling the CSR that the manual said you have to drive the car for approx. 20 minutes after sensor it replaced, it took the dealer 4 try before they finally got it working. The Hyundai dealer CSR explained that the reason it took 4 visit was because of the mechanic lack of experience. "When you replace the TPMS sensor, you have to delete all TPMS sensors and reprogram them", "the mechanic was trying to add the new sensor by just programming it.". I dont believe that is so based on info I've read. 2 weeks ago my TPMS dash light popped on again, now the test indicate the left rear has failed. Im now in the process of trying to get the warranty company to replace all 3. So far no luck. Ive seen people selling TPMS sensors for my say, saying no programming is required, but cannot confirm that is true.

 

[skipgen]

I just had an experience with my car TPMS, In Dec 2022 the TPMS light popped up on my dash, using my Diag Pro Scan Tool, it indicated the right rear sensor failed. I called my extended warranty company and surprisingly was told its covered, I took the car to a hyundai dealer to get it replaced, I explained to them that it is recommended that all 4 should be replaced. Later in the day I got a call from the dealer CSR saying, the warranty company will only approve replacement of the failed one. They replaced it, pick up the car and on my way home the TPMS light popped up again, checked again showed right rear failure, After telling the CSR that the manual said you have to drive the car for approx. 20 minutes after sensor it replaced, it took the dealer 4 try before they finally got it working. The Hyundai dealer CSR explained that the reason it took 4 visit was because of the mechanic lack of experience. "When you replace the TPMS sensor, you have to delete all TPMS sensors and reprogram them", "the mechanic was trying to add the new sensor by just programming it.". I dont believe that is so based on info I've read. 2 weeks ago my TPMS dash light popped on again, now the test indicate the left rear has failed. Im now in the process of trying to get the warranty company to replace all 3. So far no luck. Ive seen people selling TPMS sensors for my say, saying no programming is required, but cannot confirm that is true.

That's a nightmare!

 

[skipgen]

Based on my experience , they will need programming. I've enquired a few chain tire shops and they all say yes. Mavis Tire quoted $60 per sensor, I have also got up to $80 per sensor from other tire shop.

Hopefully, that's something that Discount Tire can do... Hopefully, it's covered under their warranty.

 

[dfyffe]

Yeah Discount Tire do, one of the better tire place around.

 

[skipgen]

Update - after about a day & half of malfunctioning, it decided to cure itself. The light went off a week ago & hasn't been back on since....

 

[joegr]

Antennas in rear wheel wells or potentially the battery in a tire sensor dropping out while driving.
Oh, and local interference on the radio spectrum the system uses will do it too.

I would have guessed that there was an antenna per wheel as well, but evidently that is not the case. Instead, there is just one antenna, and it is inside the TPMS module. Apparently, the module is able to follow the sensors around when the wheels are swapped by comparing the number of revolutions from each sensor to the number of revolutions for each wheel from the ABS. This works since the diameters and the amount of wheel slip is never exactly the same.

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