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Tire pressure warning light ?

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#23 ·
ger said:
My mistake, once the sensors are replaced does it require a Dealer Reset of the error? Or a calibration will clear the error? Does it vary on the TPMS system which errors require a dealer intervention?
Click to expand...
IF I’m reading the manual correctly (photo below), it says you must go to dealer to clear tpms malfunction message. I’ve had standard tpms light go on in past and I have resolved it in minutes with calibration button. This message will not clear and I’ve been driving for months. So it’s probably an error message that needs to be cleared as manual says. I’m not driving 45 minutes to dealership just for that though. I’ll wait till I get my oil and service in about 5-6 months.
https://i.imgur.com/piPVOmZ.jpg
 
#24 ·
Thanks Grant435,

The confusing part in all of this would be the comments about "just re-calibrate". I've seen on another forum that only 2 methods work in replacing the TPMS sensors because each sensor has a unique s/n(address)

Method One is to have the shop read all the info including the s/n of the TPMS sensor for each tire and program the new sensor with this info. Calibrate and good to go as the ECU will recognize the s/n.

Method Two, replace the TPMS sensors record the s/n for the sensors and have the dealer code into the ECU.

If anyone can confirm or elaborate on above it will surely clear up a lot of the confusion. And if method 2 is accurate does anyone know of a programmer that can do this?
 
#25 ·
Ger, there is a lot of people on this forum that have a lot of knowledge but I think given that all issues can vary, I would just have the dealership take care of it. It becomes there minor issue and I’m sure they will figure it out easily once they have a vehicle in possession. I’ve even called the dealership in Illinois and service tech kept saying just hit calibration and it’s fine. It’s very possible they misunderstood or make mistakes. We’re lucky that this is the issue we are having and not a much more serious one. I’m a big believer in Mastering my job and then I don’t have to worry about other issues that arise. If I do my job right then that should generate enough to allow the other professionals in the their field to handle the issues I’m not familiar with. I understand if this is something you are tackling just to keep busy or for hobby sake but I think I’m throwing in the towel with this one. Like you mentioned earlier, to many different opinions on how to correct the issue.
 
#26 ·
Tire pressure warning light

I have new tire pressure questions: When I first start the car (2016 GTS) in the morning I get the low pressure warning light, and all four tires show about 27 to 28 psi. Once I drive for a bit (10 minutes or so), then the pressure goes up to 31 psi and the warning light goes off. I know air expands with heat. My questions are: (1) this happens only with my GTS not with other cars. Is this normal? Outside temperature overnight to early morning is about high 50s to mid 60s in Los Angeles these days (2) do I fill the air based on the reading at the time of cold start or when it gets warm? My concern Is that I may ruin the tires by driving under inflated for the first 10 or so minutes; but I certainly don’t want to have 34 psi + either
 
#27 ·
I think your TPMS needs re-calibrating if you want to stop the error.

Actually I think your tyre pressures are low. You should inflate to the specified pressure when cold.

(BTW the TPMS uses the ambient air temperature to work out what is an acceptable range of pressures t1xP1xV1=t2xP2xV2)

C
 
#28 ·
The TPMS is set according to the door label in each car, where the preferred tire pressures are printed. My 2005 QP wants 29 PSI for the tires on 18-inch wheels, so the alarm won't go off until it is quite a bit below that. Other cars maybe are set higher.
 
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