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While I was driving, the TPMS warning light all of a sudden comes on, and the center display says to "Check Tire Pressure", even though the rear tire on passenger side has adequate amount of inflation. (see attached photo)
Re-starting engine a few times, the warning was still on.
Has anyone ever had this happen to your E-class?
I went to a nearby Costco, to pump some air, thinking maybe that'll make the warning go away.
I didn't realize it was closing time, and the tire shop may have turned off the pump, so the inflation actually dropped.
After getting the tire inflated the next day, the warning went away, so while I'm all good now, I was just curious what triggered the warning at the first place...would going over a pot hole, or speed hump have done it?
Reset the TPMS pressure warning... procedure is in OM. Basically set tire pressure (cold) per the fuel filler door and follow procedure in OM to set "new" pressures.
^Exactly. You need to set the new values and it will trigger at a predetermined percentage drop. You are running some very odd front to rear values btw.
The picture shows the pressure after adding some air, but when low pressure triggers the alarm, the affected wheel will show in red or something.
The alarm light will not go off immediately after adding air, so be patient.
If those are cold tire pressure, the rear axle is too high unless you are carrying heavy cargo, are you?
For E350, the fuel door will have cold values as 33 front, 35 rear for normal load. After a long drive on hot surface, the rear can reach 40 starting from 35/36. If you start at 40, you can guess the rest.
For some strange reason some tire shops always set them too high@40, and the car feels like a basketball, too bouncy in the rear, and front seems harsh and breaking apart. I always double check tire pressure after tire rotation/repair. If you drives fast, 90+MPH, often perhaps you should try lower values, but it is a personal choice and tire specs limits
Forgot to mention to NOT inflate tires when they are hot. Only in a pinch, and recheck them as soon as they are cold. Otherwise, you get random cold settings, unbalanced settings
I just had this happen to me in the last week or so. I started by checking for codes with my new Icarsoft scanner which found a code (I didn't record it) and erased the code. However TPMS light was still on. Other startups did not have a code associated with the TPMS light on the dash. This morning, my dash looked exactly like your picture, and in looking at the options, another option that came up (not sure exactly what I did to trigger this) was to restart the TPMS system. That did it. No more error light.
One of my sensors seems to be acting up when I drive at speed for more than a few minutes. Once I slow back down it finds the sensor again and the light goes out. Not sure if yours could be doing something similar.
One of my sensors seems to be acting up when I drive at speed for more than a few minutes. Once I slow back down it finds the sensor again and the light goes out. Not sure if yours could be doing something similar.
Have you checked for codes? Hopefully there should be one pending, and hopefully point to the specific wheel.
If no codes, no idea how to tackle it w/o a brute Force approach.
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TPMS warning - check tire pressure
