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Discussion Starter #1 (Edited)
TPMS Reporting "--" psi
Has your TPMS started randomly showing the tire warning light and showing "--" for one or more tire's pressure reading?
  • It could be RFID signal interference. Do you have a 12V power supply plugged in to the power port?
  • Or, it could be an issue with the Remote Door Lock receiver or the BCM it's connected to. There is a service bulletin PIC5604B. This bulletin calls for a series of tests to be performed with the potential replacement of the K77 Remote Control Door Lock Receiver (RCDLR) should they fail. The RCDLR is located in the black box on the windshield.
  • Or, it could be a battery is failing in the tire stem's TPMS sensor.

"No Remote Detected"
Have you been having issues with a "No Remote Detected" error message?
  • It could be a battery is failing in the key fob.
  • Or, it could be RFID signal interference.
Radio Signal Interference from External Power Supplies
Do you have an external power supply plugged into the lighter to power a dashcam, USB, phone, etc.? It could be interfering with the signals from the key fob and or the TPMS mounted in the wheels. Try unplugging the device for a day, week, whatever. Do the problems go away? If they do, you have solved the mystery! Buy a better power supply.


Radio Signal Interference from Tinted Windows?
Probably not. Chevy dealers dealing with the mysterious loss of TPMS or key fob signals will likely point to your tinted windows as the cause. Or they may replace the receiver in the car. They are likely very mistaken. So far, all the reports about mysterious loss of TPMS and key fob signals have been due to an external power supply from a dashcam, USB, phone charger, etc. being plugged into the car. If you have a power supply plugged in and start having issues with the TPMS or key fob, unplug the power supply. Do the problems go away? If they do, you have solved the mystery! Buy a better power supply.

Related posts:
http://gm-volt.com/forum/showthread...-me-a-notice-Warranty-Void-due-to-Window-tint
http://gm-volt.com/forum/showthread.php?125954-Anyone-having-TPMS-errors-in-their-2014-Volts-!-!
http://gm-volt.com/forum/showthread.php?141849-TPMS-Problems
http://gm-volt.com/forum/showthread...re-Monitoring-System-TPMS&p=172900#post172900
http://gm-volt.com/forum/showthread.php?74370-odd-tpms-issue&p=1179898#post1179898
http://gm-volt.com/forum/showthread...acing-Body-Control-Module&p=854690#post854690
http://gm-volt.com/forum/showthread...g-no-pressure-in-one-tire&p=981010#post981010
 

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I've been having A LOT of 'no remote detected' and 'remote left in vehicle' issues lately. doesnt seeem to matter which remote, and no pattern. Going to try replacing both batteries this weekend.

No tpms issues yet
 

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Discussion Starter #3
Yes, it could be a battery. I have replaced mine in both key fobs. Easy. I did not need to relearn the fobs, just took out the old, put in the new. I don't know if they simply stopped working or they created an on screen error as my wife simply came in and said the battery needed replacement. Since I'm the "electrician" and fully trained to replace consumer batteries, that was my job, haha.

This post is mainly to highlight a more stealthy possibility: external power supplies creating radio interference.
 

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After many 'remote left in vehicle' and 'remote not detected' messages I about lost it today.

14 hours of work. Finally get in the car to go home at after 10 pm and the pos says remote not detected and won't power up.

BOTH REMOTES WERE IN THE CAR!!!!

Yes , I will replace the batteries this weekend, but I really don't believe the batteries in the remote are the issue here.
 
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