tire pressure monitoring system

McFLY
0

Asked by McFLY Oct 24, 2008 at 10:50 PM about the 2007 Pontiac Grand Prix

Question type: Maintenance & Repair

I have to put winter tires on my Grand Prix but without the original wheels that do not include tire monitoring system What will happen and can I find a way to fix it by myself?

10 Answers

SpeedRacerOnline
160

If you want your TPMS to work, there are aftermarket versions you can add to your wheels. I would suggest checking with the dealer to find out which ones are compatible. Also, you could probably just take the sensors off of your factory wheels to install on the others, then just switch them back. A little more work, but probably worth it for a few months of peace of mind. Either way, be sure to have them reset properly when it is done or they will be reporting new readings to a computer that is expecting the old readings. You could leave them off altogether, but this may affect your ABS system. I don't know about yours, but some ABS systems rely on that information as well.

1 out of 1 people think this is helpful.
Alex Walker
135

So you put winter wheels on it? Im pretty sure your ABS works through the wheel speed sensors and the tire pressure is just for your knowledge

1 out of 1 people think this is helpful.
SpeedRacerOnline
160

ABS does work through the wheel speed sensors primarily. However, if one wheel has different pressure than the others, then it will change in size related to its inflation. That change in size will cause it to spin at a different speed than the others (just like when your speedometer is off if you change tire sizes). If that is the case, or if the computer thinks that is the case due to faulty readings, it can affect many systems, including ABS. ABS is pretty picky, and has a bad habit of just shutting down if all parameters don't match up which leaves you with brakes that will lock up even easier since the car was designed with ABS. 90% of the time, if your ABS light is on, then the system is offline and you have no ABS until the problem is resolved. Most cars with TPMS have indirect TPMS. It's not actually TPMS at all. It has no sensors in the tires and actually has no idea what the pressure is. Instead, it uses the principle I just described. It watches the wheel speed sensors, and if one is spinning at a different speed it gives you a tire pressure warning since that's about all that could cause that condition. It has no idea if one is flat or another is over-inflated; it just sees a different spinning speed. Direct TPMS has actual pressure sensors inside each tire that wirelessly transmit pressure readings to the on-board computer. The computer uses that information along with the wheel speed sensors, and more, to set things properly and monitor conditions. If 3 tires report 32 psi and 1 reports 15, but all speed sensors report 35 mph, then obviously there is a problem and it will likely disable the ABS. However, if none of the tires report (0 psi at all wheels), it may disable ABS or it may ignore the lack of information since it is equal at all 4 (0 is a bad reading, but as long as they're equal, who cares!) and simply rely on the speed sensors. You'd probably have to ask the dealer in your case.

2 out of 2 people think this is helpful.
bjones72751
10

As far as the tpms and aftermarket wheels, all you have to do is when you replace the wheels, take the sensors out of your rims and transfer them into the new ones. Make sure they put the driver front to the new driver front, or they will have to be reset, which a year ago when i did tires was pretty expensive. GM and most other vehicles that i've worked on (besides Ford) have a "Direct TPMS" which is the sensor inside the tire. It is actually attached to the valve stem on the inside. They can be swapped out easily. But if you decide to leave them out of the new rims and just put regular shrader valve stems in them, there wouldn't be anything messed up, you'd just have a tpms light on the dash lit up all the time.

1 out of 1 people think this is helpful.
Kelvin8r
30

I wanted to know the same question. I am not interested in paying a tire shop to dimantel the wheel and installing the sensor on the new rim. Using the wheels for about 3 months and then paying the tire shop to dismantel the wheel once again so I can put the summer tires back on. For a measly 3 months, I would rather disconnect the tire pressure monitoring system all together for the 3 months, and then enable the system once my summer wheels fo back on. I cant afford to keep taking the wheels apart every fall and spring, and I can't afford to put another set of sensors on my winter rims. The sensors are priced way to high and cost as much as a new set of tires. If anyone know how to turn the tire pressure monitor off, I would appreciate any help. I am driving a 2008 Impala. Thank you.

3 out of 3 people think this is helpful.
capwheel
20

Agree. During the winter, just test the tire pressure every time you fill up.

1 out of 1 people think this is helpful.
McFLY
0

After 3 winters past with my grand prix,my TPMS is still working well in the summer and when I take them back for the cold months,it takes about 2 or 3 weeks for the warning light to go on.It usually last less than 10 days then it goes off again.This game off on and off remains in the dash until the time that I put the summer tires back on my car.Finally,like someone said in one reply,it seems that every sensor belongs to a specific wheel because, after removing all the tires every time ,I do not replace them at their place they were supposed to be when I bought the car.The reason why is I rotate the tires for a better management of the four tires.

Robert Lavallee
1,535

no abs system will ever be affected by a tpms system functionality the lack of sensors will only mean that your light will be on and you'll have to moniter your pressures yourself. the older tpms systems like mine (97 grand prix gt) or some older fords and toyotas use the abs system for tpms (if 3 tires say 60.5 mph and one says 62 mph) it knows the faster one is smaller around indicating a low tire but your system has nothing to do with any other system in the car. if your concerned about it and you live in canada go to canadian tire they sell ones that will clone your exhisting monitors and the car will never know.

1 out of 1 people think this is helpful.
Samuel Holthaus
45

I've put snow tires on my grand prix 2008 . i have the tpms sensors in them but if i dont reprogram them the system doesnt work. As far as i know the tpms systems just doesnt tell you when the tire is low. It hasnt affected anything else in my car so far.. I also know lots of people do this without reprograming and just have to be old school and check the tires with a gauge.. Hope this helps you!

Robert Lavallee
1,535

unless you change the sensors they will work without reprogramming if they charge you to reprogram the same sensors on different tires go get your $$ back the serial # of each sensor is programmed into the bcm so it doesn't matter what tires they're in so unless you have 2 sets of sensors you'll never have to reprogram them short of a malfunction.

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