GM Volt Forum banner

TPMS issue

12261 Views 47 Replies 16 Participants Last post by  ianjay
Got my Volt a few months ago. Had to have rotors and brakes worked on as mentioned in another post, and all has been good since then. I did, though, have a recent alignment done and two new tires purchased. I had the old tires moved to the front and new tires installed in the back since I had put about 5000 miles on my car since it was purchased.

On my front driver side tire, my TPMS tells me, from time to time, there is a problem. It will last for a while (10-15 min of drive time). TPMS has been relearned by local chevy dealer (and when they looked at the tires, they could find no problems with TPMS), and pressure is ok..The sensor shows that this tire has a problem (I'm assuming with low tire pressure), but readings from gauge/digital pump shows everything is ok.

What are possible causes? I'm only familiar with cars that tell you a tire is low, but my Volt measures pressure for each tire. This has happened for about two weeks. Tire warning light goes on. I measure pressure. Tire pressure is ok. Warning light goes off after a few more minutes of driving.
1 - 1 of 48 Posts
TPMS Is a good system but never perfect. My first experience with TPMS was in a rental 2009 Chevy Impala in Orlando, Florida. (Enterprise), in January 2009. The following day after I rented the Impala, the left rear tire gave a warniing on the DIC (26 PSI), while the other three were at 31 PSI. I have no air pump, so I visited a local Walmart and bought a cheap 12VDC air pump and a mechanical tire gauge. When I measured that tire, its pressure was 29 PSI, so I used to pump to increase its PSI to 31. The gauge measured 31 PSI in all four tires. But the DIC still had the 26 PSI reading.

When I returned the Impala after the week, I reported the problem to Enterprise because the next rentee will probably have the same issue. Now I have a 2009 Chevy Equinox, and the TPMS reports all tires one or two units below the mechanical gauge PSI readings. So I don't trust the DIC readings 100%. I prefer to go "old school" (as posted above) and manually measure the tire pressures, but I do use the Equinox DIC as a warning when the TPMS PSI reading drop below 30 PSI.

I have also seen and read about the Ford system. Their TPMS PSI readings are taken by the BCM but stored, and the DIC only reports the "low pressure" warning when the TPMS reading drops below a specific level. It doesn't report the actual TPMS PSI reading, nor give you which tire! A Ford owner must carry the gauge to find which tire has the low pressure (The new Ford cars do come with air pumps in the trunk, just as new GM cars do).

So the GM TPMS is more user friendly, but I will never trust their readings completely.
See less See more
1 - 1 of 48 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.