2nd Gen R57 Convertible Tire pressure warning

Discussion in '2nd Generation: 2007+ R55 through R61' started by MCS02, Sep 18, 2016.

  1. MCS02

    MCS02 Moderator
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    My wife came home and said that her R57 was showing the tire pressure low. Inside the door is shows 39psi, that seems high to me. All 4 wheels were at about 32 psi, so I set them all to 39 psi. It still showed all 4 tires low. she drove it and said that it showed all 4 low then finally said only one of the rears were low. then the warning went out.

    Any ideas? Could all 4 of the pressure sensors batteries be going bad. I still have not got a Bentley manual for it, but thats ok I have MA!
     
  2. caseydog

    caseydog Well-Known Member
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    A few things.

    1. You sometimes have to drive the car for a while until the TPMS resets.

    2. If the inside of the door says 39PSI, then do it. It seems high, but 32 pounds was the standard way back when it was all about a cushy ride. The sticker on my R56 calls for 38 pounds all around, and that's where I keep them. Welcome to the 21st century.

    3. It is my understanding that the tire pressure warning sensors are passive, so there are no batteries.

    My advice is to air them up to the 39 pounds cold on the door sticker, and drive the car and see if the TPMS resets on its own.

    CD
     
  3. MCS02

    MCS02 Moderator
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    I know my R53 is passive but I thought the newer models had the sensors with the batteries.
     
  4. caseydog

    caseydog Well-Known Member
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    I certainly could be wrong, but I believe they are still passive.

    CD
     
  5. caseydog

    caseydog Well-Known Member
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    Okay, I called my buddy who knows more about cars than I ever will, and he told me that TPMS sensors are NOT passive. They have batteries, but they last a long, long time. He is a Porsche technician, so he knows stuff.

    So, I still think you should air the tires up to the pressure on the stickers, and he agrees, and see if the TPMS system resets, before spending time and money on repairs you may not need. He said that 32 PSI would easily trigger a TPMS warning if the sticker calls for 39 PSI.
     
  6. Crashton

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    I believe your Wife's R57 does have sensors with batteries. What year is her car? I doubt a battery had died, but could be. Some tire shops can read a code & tell you witch one. Like CD says it can take a while for the light to go off once you reset. Also if your Wife's car has runflats set the pressure to what the label says.
     
  7. DneprDave

    DneprDave Well-Known Member
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    You have to manually reset the TPMS after adding air to turn off the warning light. Your owner's manual tells you how.
     
  8. caseydog

    caseydog Well-Known Member
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    You read instructions? We need to take away your man card. :mad5:

    CD :biggrin5:
     
  9. MCS02

    MCS02 Moderator
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    It's a 2014 with run rocks. Thanks for the help guys, I guess. Should read the manual.
     
  10. Dave.0

    Dave.0 Helix & RMW Powered
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    You READ ?


    [​IMG]
     
  11. MCS02

    MCS02 Moderator
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    We don't read much here in the south but some times we do. Its that punctuation crap I can't figure out!!:lol::lol::lol:


    It was late:frown2:
     

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