TPMS sensor
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Cadillac STS Forum - 2005 through 2012 Discussion, TPMS sensor in Past Cadillac Vehicle Discussion; I'm having a problem with my TPMS. For several months now, whenever I would be driving more than about 30 ...
  1. #1
    Maximln is offline Cadillac Owners Fanatic
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    TPMS sensor

    I'm having a problem with my TPMS. For several months now, whenever I would be driving more than about 30 miles, I would get the message "SERVICE TIRE MONITORING SYSTEM" & at first, it appeared that the left rear tire pressure sensor was bad because it would display "-- --" & give no reading. After turning the car off & then back on, the sensor would read again & everything would be fine until I drove over about 30 miles at one time. This went on for a few months mostly because I would forget about it because again it wouldn't display a message unless I was driving over 30 miles in one trip which I didn't do daily. I finally took it in to have the sensor replaced on the left rear tire but when I went to pick up the car, the service advisor informed me that they reprogrammed the sensors & everything was working fine & that they didn't have to replace the sensor! I had told him how it had been intermittent when I dropped it off but it was working correctly when the mechanic was working on it. He said try it out & let him know. Well I didn't drive over 30 miles for about 2 weeks but when I did, the message came on again but it wasn't the left rear sensor this time. It was the right rear sensor reading "-- --"! I figured they must have swapped tires or something & didn't pay too much attention to it. It took me a few more months to take it back, again since it was an intermittant problem & didn't really affect anything. Yesterday, I just had them replace the right rear sensor this time, telling them it was an intermittant problem & to just replace it. They did & I drove over 30 miles & guess what happened. Now the left front sensor reads "-- --"!! It seems like whenever they reprogram the sensors, a different sensor reads bad!
    This is leading me to believe that its not the sensor but maybe the module that controls it? Anyone have a similar problem?

    Thanks,

    Max

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  3. #2
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    Or, they're all old and the batteries are at the end of their lives.

  4. #3
    dkozloski's Avatar
    dkozloski is online now Cadillac Owners 10000+ Posts
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    Re: TPMS sensor

    For Pete's sake the batteries in the TPMS sensors are 8 years old. It's time to retire them out to pasture.
    Don't mess with Binky Bear!


  5. #4
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: TPMS sensor

    I have to agree. I've got one with a slow leak. Fortunately, it's the one going bad. It's the second one.

    My wife's 2007 also has one growing intermittent on the coldest mornings. I bought three replacements; $32 per. The (Conti) VDO Redi-Sensor Model for the STS changed to SE10001HP.

    Next time the cars go in for service, the failing ones will be replaced.

  6. #5
    Maximln is offline Cadillac Owners Fanatic
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    Re: TPMS sensor

    Quote Originally Posted by dkozloski View Post
    For Pete's sake the batteries in the TPMS sensors are 8 years old. It's time to retire them out to pasture.
    I would definitely have to agree with you! lol I just think its odd that the "bad" sensor seems to float around to different tires. I'm getting the 2 front tires replaced in about a week. I will definitely change those sensors at that time & probably the last rear one too just so I know its not a bad tire sensor! lol

    Max

  7. #6
    1crock is offline Cadillac Owners Member
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    Re: TPMS sensor

    Yep, batteries. Mine work fine in warm temperatures. When it's cold, two of them behave just like you describe.

  8. #7
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: TPMS sensor

    One the one hand, it's kind of a shame that the batterie(s) are epoxied in place and cannot really be replaced.

    On the other hand, most tire stems are starting to show their age by the time the first set of tires are replaced, anyway.

  9. #8
    dkozloski's Avatar
    dkozloski is online now Cadillac Owners 10000+ Posts
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    Re: TPMS sensor

    Changing TPMS sensors is an easy DIY even for a doddering old fool like me. I have written up the procedure twice now.
    Don't mess with Binky Bear!


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