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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > TPMS Says Low, but they aren't...



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      11-03-2013, 12:37 PM   #1
Agentphish
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TPMS Says Low, but they aren't...

I have an 08 e90 with Continental SSR Runflats.

Car sat for two days and weather became colder during this time. Started it up this morning shows low. Drove up the street (.3mi) to get air, it was a couple PSI low on each tire with my own gauge, but nothing major, so I topped it off. Tried to reset TPMS, it said TIRE LOW! then RESETTING, but then TPMS showed it was still low after resetting.

I drove about 10 miles then let the car sit for 40 minutes, measured again, showed 1-3psi over on each tire. Let it a while longer, Started car, still shows low. I tried to reset, it said TIRE LOW! then RESETTING. Then TPMS still shows low.

So what am I doing wrong or missing because with my gauge it doesn't seem like there's any problem.
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      11-03-2013, 02:09 PM   #2
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Quote:
Originally Posted by Agentphish View Post
I have an 08 e90 with Continental SSR Runflats.

Car sat for two days and weather became colder during this time. Started it up this morning shows low. Drove up the street (.3mi) to get air, it was a couple PSI low on each tire with my own gauge, but nothing major, so I topped it off. Tried to reset TPMS, it said TIRE LOW! then RESETTING, but then TPMS showed it was still low after resetting.

I drove about 10 miles then let the car sit for 40 minutes, measured again, showed 1-3psi over on each tire. Let it a while longer, Started car, still shows low. I tried to reset, it said TIRE LOW! then RESETTING. Then TPMS still shows low.

So what am I doing wrong or missing because with my gauge it doesn't seem like there's any problem.
I see you have a 2008. TPMS give out around 4-6 years. Very possible they are going out
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      11-03-2013, 02:27 PM   #3
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For the tire that still shows low, air it up well above the normal range but under the max tire value . For example, you may normally fill it up to 32psi. You noticed it was low at 29psi. Your max tire pressure is 50psi. Fill it up to 42psi and then let the air out to about 35psi. Drive around and reset it. After you reset it, then lower it to the normal range of 32psi.
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