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TPMS Receiver bad?

2557 Views 56 Replies 7 Participants Last post by  PONY MAN
So, I have been fighting a TPMS problem for a while. From reading, it looks like the remote control door lock receiver (RCDLR) takes in the wheel sensor data and transmits it to the DIC. Is there a way to test the RCDLR? I wonder if it may be failing.

When the problem started, I had a local shop replace the sensors. Turned out two were not working and asked them to replace all four. Didn't know to ask about brand at that time. Over the next few months, sometimes the DIC would display tire pressure, other times it didn't and reported a fault. Performed the learn process a couple times as well.

Just had the new tires and wheels installed and requested they use GM Genuine TPMS sensors. About a week after I picked up the car, it started reporting faults again. Sometimes worked, sometimes didn't. I don't have one of those tools to check the operation of the tire sensor.

Should I just go ahead and replace the receiver?

Thanks.
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Order the 2 you need then take to tire shop, tire does not need to be removed just depressed at valve area with tire machine, it is plenty of room for replacement, how i did them when they went from a band holding them inside middle of rim to just the nut for replacement
Just got back from the shop. All four tires re-learned on the first pass. All batteries showed plenty of life in them.

I may be looking at the RCDLR if it goes out again.
Did you confirm the brand of sensors? Genuine? Are the issues typically occurring in the same general vicinity?
My dumb--- forgot to ask about the brand.

When it has failed, it seems to be the LF that errors. It has been doing that since I bought the car in Jan 2021. It has been replaced twice before. And, I don't know what brand they installed each time. If it goes again, I will buy a GM brand and take it over there with me.
Just running down the highway yesterday around 70mph and I get the Tire Fault error. Car can't read any of the four tires.

I may try the relearn process today but, my time may be better spent trying to find someone to reprogram a replacement module.
Are the issues typically occurring in the same general vicinity?
If you can scan RCDLR Module, i'm sure it has codes in it and see if BCM lost data with it in BCM data, data loss will be Uxxxx codes, but that sure is very similar to a faulty RCDLR module
Pony Man, I thought it may be some kind of interference myself but, it happens on different highways. The only other device I have in the car with me is my iPhone 13.

Thawk, I have an Innova 5410 OBD2 scanner, that's it. Would that find the codes or do I need a different kind of scanner?
I just found this thread about issues with an upgraded stereo installed which I have.

(20) Tire system fault after stereo | Pontiac G8 Forum (g8board.com)

I wonder if that is the issue. I have a 1200 watt amp and two 10" subs in the trunk. Maybe I need to remove the rear seat and trunk trim to see if I can find the antenna for the module?
The solution to the aforementioned thread was to replace a sensor albeit frequency interference from the radio system is possible.
So the day after my last post, I drove the car around town to run a few short errands. No TPMS error and it was showing four tires with pressure. Nice. I hadn't touched it from the previous failure.

Over the past ten days, the TPMS is almost working correctly and only fails about 25% of the time. I do not run the relearn process when it fails. Just the next day or the day after, it starts working again, sometimes the same day. Crazy.

I think I am noticing a pattern that when I am running over 60MPH for 30 minutes or so, it will fail, sometimes... I seem to remember I may have had the stereo cranked up a bit as well, not sure.

I believe more testing is required to home in on the actual problem/failure.
Reading about the TPMS system, these are things they say can happen. When the car is in a stationary condition, each sensors transmits a signal to the RCDLR every 30 seconds. If (over a period of time) any of the 4 sensors detects a change of psi equal to 1.2 psi up or down, it will update the RCDLR. At ignition turn on the tire psi readout would then show what, if any change had taken place. Once the cars speed gets above 25 mph, each sensor switches over to the rolling mode of transmitting. In the rolling mode, the sensors continue to transmit as they did in the stationary mode, an updates the RCDLR once every 30 seconds."IF" any of the sensors fails to transmit a signal in the rolling mode (after 18 minutes have gone by), its seen as a TPMS fault, an sets a C classified fault code as well as that annoying TPMS condition in the instrument cluster. The system might be able to re set itself if whatever caused the fault, goes away and the drive cycle is continued long enough (not positive on that). But it does say the system resets itself after a period of time and a new ignition cycle takes place.

That's the way my 09 works. It only happens at specific times, an locations where I drive. My 11 GMC truck never has a problem when driving at those same times an locations as the G8.. I want to lean towards the RCDLR's antenna location as the most probable cause. Thinking that strong 315 mhz signals are over powering the strength of the tire transponders signal. The RCDLR not seeing those 4 transponders (with their 30 sec cycling signals for a period of time), can no longer trust what psi exists in the tires, and is told to fault an set the TPMS warning circuit. Can't bring myself to mess around under that shelf (where the RCDLR sits), to verify if that's the problem area.
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Thanks for this.

It seems to fail purely at random and mostly when I am driving at highway speeds. And, as you described above, after a period of time, it will reset itself.

I'll probably get one of my three adult sons over here one weekend and we'll pull the back seat, rear deck and truck trim to see if I can find and move the antenna.

I really appreciate the effort here.
Crazy but, I have not had the TPMS error for a few weeks now. I dd not try and find nor move the antenna.

I'm putting this on the back burner unless it surfaces again.

Thanks for all the info.
It seems to fail purely at random and mostly when I am driving at highway speeds. And, as you described above, after a period of time, it will reset itself.
Your tire sensors are most likely dieing. The counterfeits I installed from Ebay last year did the same thing after a couple months due to (likely) the batteries being dead. It would do exactly as you describe. When I swapped to the winter wheels and tires, with known good TMPS, it never did it for the entire duration of driving on them until I swapped back to the OE wheels with the bad sensors.
I had brand new GM TPMS installed a few months back. The local shop said the batteries are still strong.
Did you confirm the brand of sensors? Genuine?...
My dumb--- forgot to ask about the brand.
When it has failed, it seems to be the LF that errors. It has been doing that since I bought the car in Jan 2021. It has been replaced twice before. And, I don't know what brand they installed each time....
I had brand new GM TPMS installed a few months back....
:unsure:
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