08-06-2015, 06:49 PM | #1 |
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False Tire pressure Alarm?
Hi,
Given our Canadian cars don't come w TPMS and use some sensors to detect some difference of tire pressure, how accurate is this system? Driving today in the highway I got the orange Alarm even in the HUD! Parked on hard shoulder and checked, all four tires were equal pressure of 35psi. I had them inflated at 32psi cold. |
08-06-2015, 10:08 PM | #2 |
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Happens to me too, but in my case there are minute difference in the air pressure.
Make sure you use a good air pressure gauge. Those pencil- tip ones are lousy. I use this one: http://www.amazon.ca/Joes-Racing-323...4P0EPG819CKTZ2 M |
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08-07-2015, 06:12 AM | #3 | |
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Just saw this vid , it has a nice feature to deflate an over inflated tire, nice! But still confused about the hold valve feature? Def buying it, thanks for the tip. or maybe I'll go crazy and get the digital one Last edited by aboulfad; 08-07-2015 at 06:38 AM.. |
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08-07-2015, 06:46 AM | #4 | ||
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These gauges are definitely more accurate than the pencil-type. Finally, the hold valve allows you to remove the gauge from the tire valve, yet the reading does not go away / reset to zero. The reading is held on the gauge face. M |
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08-07-2015, 06:57 AM | #5 | |
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08-07-2015, 03:12 PM | #7 |
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Has happened to me several times, usually when driving somewhat aggressively on roads with a bit of gravel in places. Not sure why. Never had an actual flat tire. Thanks for the suggestion on a better pressure gauge. Will have to get one.
Anyone know what would be involved in installing U.S. style TPMS? The winter tires I bought in the U.S. have the sensors in the wheels but I don't have the receiving part(s). |
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08-07-2015, 04:19 PM | #8 | |
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08-08-2015, 12:30 PM | #9 |
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Happened to me when I first picked up the car after about 60k. checked and all tire pressures were 39-40psi hot.
I just chalked it up to the techs forgetting to reset TPMS. |
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08-08-2015, 12:33 PM | #10 |
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Of course you have checked your tire pressure since? My dealer on delivery had them super inflated... First thing I checked.
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08-08-2015, 01:13 PM | #11 | |
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The come shipped pretty inflated so your dealer probably forgot to set the tire pressures properly. |
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08-10-2015, 10:04 PM | #12 | |
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Had to stop because of the warning. When i checked the pressure (warm) they were at 42 to 40 psi. So I guess my dealer did not check the pressure when they prepared the car. Still get the warning from time to time. |
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08-22-2015, 10:06 AM | #13 | |
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So do I blindly trust the Joes racing gauge and set the tire pressure at 32psi while the digital pencil one shows 34psi? |
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08-23-2015, 11:07 PM | #14 | ||
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For the street I don't think it matters much, but I trust my Joes gauge. M |
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08-24-2015, 09:57 AM | #15 |
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I also used the included tire Compressor that comes w the car and that one gave 30psi. So I will go w the Joes racing measurement. It gives consistent results. Thanks!
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08-24-2015, 04:23 PM | #16 |
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Happened to me few times too,checked all the pressures , reset the system and everything was fine..seems to be a common issue
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08-24-2015, 04:32 PM | #17 | |
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08-26-2015, 05:23 AM | #18 |
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My E92 was notorious for giving false alarms. My M4 has been good thus far.
Note that the TPMS system on Canadian cars works off the ABS/DSC wheel speed sensors and monitors diferences and changes in the relative wheel speeds to "guess" if a tire is running low. Because of this, it is imperative to reset your system through iDrive every time you adjust the tire pressures. If you don't, the system will falsly believe something is askew and will likely trigger a false alarm. Last edited by CanAutM3; 08-26-2015 at 06:16 AM.. |
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08-26-2015, 06:29 AM | #19 | |
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08-26-2015, 09:31 AM | #20 | |
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http://www.amazon.com/Eastwood-Digit...Pressure+Gauge
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Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black Last edited by CanAutM3; 08-26-2015 at 09:51 AM.. |
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08-26-2015, 11:27 AM | #21 | |
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08-26-2015, 02:30 PM | #22 | |
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