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E46 M3 (2001-2006)

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  #1  
Old 05-17-2017, 07:27 PM
arambkk arambkk is offline
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Location: Philadelphia
 
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Mein Auto: E46 M3
Tire sensor?

So long story short. For the last month, about twice a day, my tire pressure monitor light comes on on my dash board. Of course there is no flat and I have the correct pressure in them but the light keeps popping up while highway driving, I erase it, but it comes back like 30 seconds later

And today after I got off the highway, 2 lights popped up. The yellow BRAKE light and the yellow traction control light. Does anyone know what this might mean? I'm guessing something with a tire sensor for one of the tires but idk. Any advice will help please


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  #2  
Old 05-19-2017, 05:33 PM
X3-terrestrial's Avatar
X3-terrestrial X3-terrestrial is offline
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Quote:
Originally Posted by arambkk View Post
So long story short. For the last month, about twice a day, my tire pressure monitor light comes on on my dash board. Of course there is no flat and I have the correct pressure in them but the light keeps popping up while highway driving, I erase it, but it comes back like 30 seconds later

And today after I got off the highway, 2 lights popped up. The yellow BRAKE light and the yellow traction control light. Does anyone know what this might mean? I'm guessing something with a tire sensor for one of the tires but idk. Any advice will help please


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Try initializing the tire monitor system, the yellow brake light could mean low brake fluid, check that first.

Initializing the system
Initializing is necessary to familiarize the
system with the correct tire inflation
pressure.
Repeat this process after any changes
in tire inflation pressure, tire replacement
or rotation.
1. Check the tire inflation pressure in all
the tires, comparing them with the
inflation pressure table (page 25),
and adjusting their pressure if necessary
2. Turn the ignition key to position 2
3. Press button as long as you need to
until the indicator lamp in the instrument
cluster lights up. After a little
while, the indicator lamp will go out
by itself
4. After a few minutes, the Flat Tire
Monitor will accept the current inflation
pressure as the value to be
measured against, and from that
point on, can detect and report a flat
tire.

Activating/deactivating the
system

The system is automatically activated in
ignition key position 2 and consequently
is on whenever the vehicle is
operated.
To deactivate the system, tap the
button, the indicator lamp will light up
yellow.
To activate the system, tap the button
again; the indicator lamp goes out.
Deactivate the system when snow
chains are mounted, since false warnings
and undetected losses in pressure
are possible under these kinds of
conditions.
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Old 05-19-2017, 08:52 PM
Autoputzer Autoputzer is offline
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The E46 doesn't have "tire sensors." It detects a low-pressure tire by using the wheel speed sensors (also used by the ABS and DCT). When it sees one wheel rotating faster than the others, it gives a tire alarm. You car's 12 to 16 years old. So, electrical stuff is going to break occasionally. If you're getting a traction control light and a flat tire light, it's likely something associated with the wheel sensor (or wire coming from it). Like X3-T said, the first step is to re-initialize the system. Do it when the tires are completely cold, in the morning before sunlight hits them.
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