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Old 06-25-2010, 02:29 PM   #1
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Exclamation TPMS issues - finally a response!

I contacted a few TPMS sensor manufacturers in light of the issues recently, regarding the TPMS sensors pairing with the car and then dropping off after reaching highway speeds. Orange Electronics produces OEM and aftermarket sensors, one of their technical guys responded back to me.

Apparently, GM decided to change their sensor frequency mid-year during production of all 2010 models. The early 2010 models have a 315 Mhz frequency sensor in the tires. Somewhere along the way, they became 314.9 Mhz sensors. This new 314.9 Mhz frequency is GM's new "Global Standard".

This issue is so new that even the current sensor part #'s in GM's database still reference the old sensor. Most GM dealers aren't even aware of this issue yet. They will continue to mis-diagnose the problems until this information is shared.

The older OEM (and replacement aftermarket) sensors using 315 Mhz will pair with the new 314.9 Mhz TPMS system since the frequencies are so close. The sensors will function properly for a short time, and then will drop out once the wheels are at highway speeds for a short interval.

As of this moment, there are no aftermarket 314.9 Mhz sensors available. They should become available soon. If you go to the GM dealership and order new TPMS sensors, chances are you will still end up with the incorrect 315 Mhz sensors, since the GM part numbers are not updated yet.

This explains why earlier built 2010 Camaros seem to work fine, later cars have issues.



Until these issues become more clear, I will no longer sell TPMS sensors. I apologize if any of my customers have had TPMS pairing issues. It appears only the ones that came with your car might be the current solution. I will gladly refund you for the TPMS purchases, or exchange them for 314.9 Mhz sensors, once they become available. Only a handful of customers have seen this problem so far.

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Old 06-25-2010, 02:43 PM   #2
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I know we all greatly appreciate the research. Fine work sir!
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Old 06-25-2010, 04:28 PM   #3
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Good info indeed.

Is there any way we could found out when the switch happened? So people could pin-point which they have by just checking their build date.
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Old 06-25-2010, 05:07 PM   #4
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I assume this means swapping the original sensors to the new wheels would elliminate this issue?

Any idea if the stock sensors fit aftermarket wheels?
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Old 06-25-2010, 05:13 PM   #5
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Aaron, your stock sensors should work. The way we have them mounted inside your tires, the stockers will work as-is. Usually the seal around the rubber nipple gets damaged when removed, but since yours won't be used to seal anything they should be fine.

We can mark the wheel and tire with a wax pencil, then it shouldn't even need a re-balance.

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Old 06-25-2010, 05:18 PM   #6
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Quote:
Originally Posted by g-townmach View Post
Good info indeed.

Is there any way we could found out when the switch happened? So people could pin-point which they have by just checking their build date.
FrankT made an interesting response in the other thread. I'm betting this number is related.

"There is a bulletin out from GM on this #PIC5174G. If your car was built before breakpoint A9132183, the BCM needs an update. You will need to go to the dealer for this."

Looks like they wish to update the older build cars. This probably means your BCM will be reflashed to accept the 314.9 Mhz sensors. They will probably then make all replacement sensors the 314.9 Mhz model. I'm not sure if your current 315 Mhz sensors will continue to work though.

DO NOT do this if you still have the original 315 Mhz sensors (older Camaro builds). Might become reverse-wonky. LOL that would suck.

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Old 06-25-2010, 05:36 PM   #7
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As Nine Ball knows, I am one of the folks experiencing this very issue.

First let me give a huge THANK YOU to Nine Ball for finally getting to the bottom of this. It's been a very frustrating issue!

I had finally given up on the TPMS sensors that Nine Ball included with my wheels and I ordered new OEM sensors from my dealer yesterday. The parts manager order a new set of OEM TPMS sensors for me. When he placed the order, he used my VIN to get the correct part number. I picked them up today. I am just wondering if they are actually the correct sensors based on this new information. By the way, my car was built on January 11, 2010 and the VIN is 181297.

I guess I should take apart my stock wheels and use those sensors. The thing is, I have someone who wants to buy them, but I'm not sure if he'd buy them if I take the sensors out of them.

Edit: Nine Ball looked up the part number of the sensors I just bought and they are probably NOT going to fix my problem. I'm going to take the sensors out of my stock wheels and put them in my new wheels.
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Old 06-25-2010, 05:40 PM   #8
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Terri, that GM sensor part number 12768826 is the old version (315 Mhz) sensor. Nobody seems to know what the new sensor part # is. The GM service computers have not been updated to reflect the change in sensors.

You might instruct your OEM wheel buyer that he should use his own TPMS sensors in your wheels, or he could run into the same issue.

Its a safe bet that VIN numbers built after 132183 have the newer 314.9 Mhz sensors.

This thread should probably be a sticky, as it can be an expensive lesson.

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Old 06-25-2010, 05:45 PM   #9
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Tony,
Thank you for looking up that part number - that is indeed the part number on the receipt.

I just sent the member who is interested in my wheels a note to that effect. I'll return the sensors I bought today to the dealer. I'll have my stock sensors put in my new wheels.
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Old 06-25-2010, 05:51 PM   #10
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Aaron, you stopping by this weekend? Give me a call if so. I wonder if there is a GM part number printed on the new sensors.
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Old 06-25-2010, 05:52 PM   #11
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Dang yet another vendor bringing HUGE value to these forums. Way to go Tony
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Old 06-25-2010, 05:57 PM   #12
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Thanks Tony!!

What a pain!
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Old 06-25-2010, 06:44 PM   #13
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Don't get all that much earlier than mine. vin# 9067, built in early May. I'm having the issue. Could your info be wrong?
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Old 06-25-2010, 07:15 PM   #14
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Thats good info... thanks NineBall
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Old 06-25-2010, 07:17 PM   #15
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I wish someone from GM would read this and give us some information.
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Old 06-25-2010, 07:36 PM   #16
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This doesn't quite make sense.

I got my car in September 2009. I have another set of TPMS sensors, wheels and tires. 43192

My factory installed TPMS sensors are on my winter wheels and tires. I bought the OEM sensors. Two from Ebay, and two from Rodgers Chevrolet. They are currently on my car, and have been there since March with no issue.

Now I did have a problem in march with setting the TPMS, as the left rear (last tire) did not want to take, and it wasn't until the 3rd cycle that I got it working.

Is it because I programmed my TPMS by letting air out of each tire, verses having the dealer use another tool?

I should have the problem if what is said is true, based on the vin cut off. Darth_emma shouldn't have the problem because her car is newer than mine.
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Old 06-25-2010, 08:08 PM   #17
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Shuttduck, you have it backwards. It seems older cars and older sensors are less likely to have the pairing issues. Not having one wheel pair up is usually a signal or reset issue, that is something completely different. This only addresses the tendency for paired sensors to suddenly stop communicating with the TPMS system and dropping off.

I use an electronic TPMS reset device, any good tire store should have one. Seeing how the Govt is mandating that all vehicles have these sensors, it is probably a good tool for some of you to add to your collection. Saves you a few trips to the tire store or dealership. I got mine for under $200. Looks like this one:

http://cgi.ebay.com/ebaymotors/TPMS-...motiveQ5fTools
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Old 06-25-2010, 08:28 PM   #18
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Quote:
Originally Posted by Nine Ball View Post
Shuttduck, you have it backwards. It seems older cars and older sensors are less likely to have the pairing issues. Not having one wheel pair up is usually a signal or reset issue, that is something completely different. This only addresses the tendency for paired sensors to suddenly stop communicating with the TPMS system and dropping off.
No I think I have it right. Mine is a newer car. It has the newer rear window seal, but was one of the last built before the GM badge of excellence and the ambient lighting in the dash plugs were removed.

I'm also missing the rear backup sensors.

Anyhow, I bought the TPMS sensors in February. The part number I had was replaced from what was on GMpartsdirect.com

I set the TPMS through the car computer rather than anything else.

I do have OEM wheels, OEM sensors, and OEM tires though.
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Old 06-25-2010, 08:41 PM   #19
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Interesting,I'm a parts manager at a GM dealership,I'm going to have to see what I can find out on this issue
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Old 06-25-2010, 08:48 PM   #20
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Aaron, you stopping by this weekend? Give me a call if so. I wonder if there is a GM part number printed on the new sensors.
Not looking likely. Out of town on Sat coming back Sunday, but its shaping up to be pretty busy.
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Old 06-25-2010, 08:50 PM   #21
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Quote:
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Interesting,I'm a parts manager at a GM dealership,I'm going to have to see what I can find out on this issue
If it helps you any, the part number I bought was 12768826

They were made in the UK.
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Old 06-25-2010, 10:14 PM   #22
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If it helps you any, the part number I bought was 12768826

They were made in the UK.
That is the exact part number I picked up today for my car. The parts manager ordered them based on my VIN. Nine Ball seems to think they won't work with my car's system and that I should probably take the TPMS out of my stock wheels and use those.

So, I think I'll return these sensors to my chevy dealer on monday and use the sensors out of the stock wheels.

I wish I didn't have to take the stock wheels apart to do this, but I really want the TPMS system to work properly in my car.
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Old 06-25-2010, 11:00 PM   #23
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No I think I have it right. Mine is a newer car. It has the newer rear window seal, but was one of the last built before the GM badge of excellence and the ambient lighting in the dash plugs were removed.

I'm also missing the rear backup sensors.

Anyhow, I bought the TPMS sensors in February. The part number I had was replaced from what was on GMpartsdirect.com

I set the TPMS through the car computer rather than anything else.

I do have OEM wheels, OEM sensors, and OEM tires though.
What are the last 6 digits of your VIN?
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Old 06-26-2010, 04:16 AM   #24
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Quote:
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What are the last 6 digits of your VIN?
143192
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Old 06-26-2010, 04:43 AM   #25
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143192


Grrrr....Are 2011's going to be a whole new ball game?
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