Hello everyone I am new to this site and I was driving my 2008 C6 on the highway today when the TPMS sensor light came on and it said service tire pressure monitor. I looked through and it had my back left tire said XX any ideas.

 

Moving your thread to C6 General. They'll be glad to help you.

 

Reset it and see what happens. My 08 has 74000 miles on it and my left rear is acting up, but I only get the message 'Low Pressure Left rear'......Battery going bad in the TPMS getting weak.

 

Battery probably going dead as Cherokee Nation said. I would ignore it until it comes on and stays on. Mine come on, then go off. They are about $80 each plus someone to break tire down and remount, probably another $10 each.

 

I called Discount Tire last week and they are $64.00 and free install.

 

Mine did that a few months ago and has not done it since. My RF showed xxx and I checked it and it was fine and worked normally the next time I started the car and ever since. Now that said it will go South tomorrow.

 

My left front is doing the same thing, and if the do it and start acting normal on the next car start, I think it is something to do with the antenna system.

When it cools down some, I'm gonna check all the wiring out in that area.

Mine will almost always act up for a day after a torrential Florida rain, and then work fine for a couple weeks, and I checked the TPMS voltage with my reset tool, and it is fine.

I'll post info out here on what I find for these types of intermittent TPMS XX or Service Tire Monitor System, if I find anything helpful

 

^This.^

 

The RR sensor has been occasionally doing this for the past couple of years on my 2011 ZR1. It pretty much only happens at one location on the freeway so I think it is RF interference overwhelming the weak battery in this one TPMS. It resets after parking for the day. I will replace both rear sensors when the time comes to replace the rear tires. My rear OEM PS2 ZPs have nearly 35k miles and could certainly make 40k before replacement.

 

My plan as well when the time comes for new tires.

 

Interestingly, my 07 vert still has the OEM TPMS sensors and have never once in over 9 years ever done what the RR on my 5 year ZR1 has done for two years now. Go figure.

 

Just a reminder, GM changed the sensor type in 2010 so they won't work with 2009 or older model vehicles. I found out the hard way when I bought new rims and tires for my 2008 Z.

 

No absolute confirmation here, but with a couple years experience and a little testing, my guess is that a weak sensor can be temporarily unresponsive due to an electrical disturbance or a temporary communication issue. I have about 128K miles and nearly 9 years use on my OEM sensors. About 2 years ago, one of them started having an occasional blip that showed wrong info on the DIC. It always cleared itself in 3 or less ignition cycles, but I could never identify the cause. I suspected it's just being near a high power source that's creating interference at the exact time there is a sensor update request.

A few years ago I used to park at work near a power pole with a transformer. My DIC would show NO FOB DETECTED quite often. So I moved over two parking spaces away from the poll and rarely had it happen again. Since the TPS, FOB, door and hatch sensors, and ignition switch all work through the same 315 Mhz system, I had assumed I had identified the culprit.

Now I also had been having issues with my FOB for the past few years, where it would occasionally not passively unlock doors or start the car on the first, second, third, or more try. I'd put in fresh batteries that I checked to 3.2 volts minimum every couple months and it wouldn't continue to resolve the problem. So recently I swapped FOBs with my wife, who rarely drives the car and I haven't had any problem of any sort for the past 6K miles, including false TPS readings.

I can't be confident that the #1 FOB was the cause of interference or lack of communication, but if anyone else who has the occasional errors would care to switch to their other FOB and see if their issue went away, we can help each other to find the true cause.

 

Hey Tom Thanks for the tip. I will try resetting my sensors using my other FOB tomorrow morning. This past week I bought a set of CCW's along with new tires and 4 new sensors. Had everything mounted up and using my relearn tool only the drivers front will set. I drove the car a couple of days and cycled the ignition a few times and still can only get the drivers front to relearn. I find it hard to believe that 1 out of 4 brand new sensors worked and that the drivers side front only relearned. I will give you a report tomorrow morning once I use the other FOB. Thanks!

 

I'm not sure that the FOB may be involved during a relearn, but we'll know soon.
BTW, you might try the relearn starting with any other wheel to verify if the tool is not resetting. If you can get another wheel and only one, you may have a tool problem. It's a way to check each sensor too.

 

Make sure you're putting your reset tool on the rubber of the tire at the valve stem. I've seen lots of "point it at the valve stem" instructions and in my experience it doesn't work there. You need to point it at the sensor body around the rim:

 

Ok went out this morning and tried my other FOB and I did get the 2 front wheels to relearn but still a no go on the rears. I'm using the same relearn tool in the Video and on my other 2 sets of wheels I have no problems. The wheels I'm having problems resetting are the rear CCW SP500's that are 19x13's. I did try putting the tool closer to the stem because otherwise it is a good 6" from the outside edge of the tire to the sensor and it didn't matter.

Like I said above using the same tool and tried several ways to get the rears to relearn and nothing yet. Maybe the local tire shops relearn tools are stronger than the cheaper one I'm using? I'm going to try that first next week once we get out of the flooding conditions we are having in Southern Louisiana right now.

 

Interesting video, thanks for posting. Now I know how it's done.

 

Did it correct itself?

 

If all else fails, you could break the bead near the sensor and park the tires near the car to do a relearn.
Just for future info, you can do the relearn procedure without having the sensors installed in tires. It's just the order they get scanned and where you place them that makes the DIC readout correct. It'd also identify a bad sensor before ever installing in a wheel. It seems there have been a rash of bad ones sold through Amazon recently.

BTW,The flooding in TX and LA has been outrageous this year.