Yes, it could be the tire sensor (this vehicle does not use TPMS but determines the tire revs and equates this to pressure. This could be more serious as a potential wheel speed sensor could effect operation of ABS & DSC - they both use wheel speed sensor to determine if they are needed to come on to aid the driver in keeping control.
Regardless, the tire pressure is still the same (I've checked) in all 4 tires and only recently has it started to light up. I check tire pressure pretty frequently and think that's not the issue.
My SA will have the tech use the BMW service computer on Friday to check for codes and see what the situation is.
Thanks for the reply.
Quote:
Originally Posted by StephenVA
Answer:
The vehicle uses speed sensors to read tire revs. At higher speeds the difference between 2-3 psi right versus left tire, front versus rear tires will trigger the alert. Lower speeds may not trigger the delta difference. Warm tires expand, colder tires do not.
Double check the tires, make sure they are within 1 PSI of each other, reset the tire alert system, and drive. The proceedure is on the forum in multiple postings. Also in the owners manual. My took two attempts at resets.
Edit: Check tires first thing in the AM when they are STONE COLD.
Tire Rack tire pressure info - more that you would want to know. http://www.tirerack.com/tires/tirete...141110170219:s
In my experince, the system on the 4.8is (big tires) is more s usceptible to alert triggers on small psi differences between the tires.
Buy a professional tire gauge (0-60 psi) instead of a pencil gauge that uses friction vs psi to display PSI. I have all the above and see a 1-2 psi difference between new.
Suggestions: http://www.summitracing.com/search/p...-and-inflators
Intercomp Racing 360060 - Intercomp Racing Glow Tire Pressure Gauges
I am an analog visual, so this is what I have. Others like digital...
Now back to the discussion on what air mix is inside the tires......
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