Check TPM System? What's this mean?

[Adam Control]

What's up gentlemen? Quick question...

This morning and last night a message popped up on my EVIC after driving for a period of approx. 15-20 minutes that read "Check TPM System". My tire pressure when checked on the EVIC was between 35 and 37 on all four tires and when I physically checked them they were about the same as the read out. Only problem I found was that I was missing a valve cap. I checked to see if I would pull any codes and a message popped up saying "Check Park Assist". The park assist message only popped up once and when I turned the key off and checked again, it was gone. No codes. Only code I pulled wa P 0128 but that's from my 180 thermostat and it being the coldest day of the year yesterday on LI (gotta pull fuse 11 to clear later). I don't wanna just clear the codes without consulting you guys for suggestions. I really hate taking this car to the dealer every week for new problems. I can't afford to give the car up anymore.

Thanks!!
AC

[FloridaRT]

Probably just due to the cold weather, I wouldn't worry...............

Or you might have a tire pressure sensor going bad????????????

Keep an eye on it.

Bob

[tommyzdesign]

same answer as flrt. might be cause its freakin 8* outside or maybe the sensor is going out on you. is it with your stock wheels or your others ?

[goldsmi]

Hi.
Had the same problem on wife's '04 Pacifica when the weather first got cold.
You need to determine which TPMS you have, there are two - you may have to 'retrain' the system.

I think the change was made in the late '04, early '05 timeframe. Forum member fnkychkn may know for sure.

If you have the early-build system, you will need a washer-shaped magnet that fits over the valve stem. I had a suitable one from another project, but you may need to get something like this:

http://cgi.ebay.com/ebaymotors/New-C...spagenameZWD1V

but don't spend that much!


The Pacifica EVIC has a selection that says something like 'Retrain TPMS'. When you select it, the EVIC displays something llike 'retrain LF' - you slip the magnet over the LF valve stem and after a couple of seconed the horn chirps a confirmation. The EVIC message changes to 'retrain RF'. Slip the magnet over the RF valve stem, wait for the chirp, move on to RR, then LR.

The whole thing takes about a minute.

Keep us poisted.

AL

[Adam Control]

If it helps the car is an '07 so I'm sure the TPM is the newer setup. If it is a sensor going bad these are the stock wheels anyway so I don't mind all that much if so. The ID wheels that I have for summer have perfectly fine sensors in them. I think I'll just keep an eye on the pressure till then. And it started happening yesterday which WAS the coldest day of the year. I'm aiming towards that explaination.

[fnkychkn]

"check TPM system" means the WCM (wireless control module), which monitors tire pressures, has detected a malfunction in the system. you'll need a scanner to find out what it is. if it only happens when cold, it's most likely a trigger module performance fault. TSB 08-008-07A should take care of it.

cold weather only affects the pressure in the tires. it should not affect the system operation. if it detects a low pressure condition, it should display "xx tire low pressure" and the low pressure warning lamp should illuminate.