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Hi all, Yes I looked and could not find a solution on the forums for this issue. Daughter has a 2013 4matic with 14k miles. While driving at speed the ABS, traction control lights came on and it went into limp mode. I told her to shut it off and restart, then switch to S mode and manually shift it home. My code reader specified left front WSS was the issue so I changed it out. I checked to make sure it was seated properly, correct torque on mounting bolt and checked the harness for any corrosion around the pins. Checked the PSI in all wheels but could not reset the fault. Drove it around in normal mode which of course drove it back into limp mode. This time the check engine also flashed on. I was able to keep clearing that one however no progress on the ABS/traction control lights. I was able to read the other 3 wheel rpms from the reader with the exception of the left front.
Voltage of control unit N30/4 (Electronic Stability Program Control Unit) is too low (under voltage)
Implausable Values of Sensors on front axle
Not sure what to do next. I am using an iCarsoft EU Pro for diagnostic. Thanks in advance for any suggestions
Was a Mercedes sensor used, or aftermarket? What was the exact code that came up prior to replacing the sensor?
Have you checked the brake fluid level just for fun?
I was reading some other posts where people had this issue and they swapped the sensor but ABS light remained on. They were able to read speed and forward motion from that sensor though. They say the solution was a new wheel bearing, in there Mercedes the magnetic ring is in the wheel bearing, not in the seal like in a W204. On the W204 I think its on the axle part of the seal.
i had that code previously and nothing came of it. I remember driving and the ABS light started flashing on and off. has been fine since.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
What was triggering the CEL/MIL? On a couple of occasions when I had the loss of ABS, etc., I ended up replacing my batteries. Have her batteries ever been replaced?
Yes both replaced with OEM batteries within a year. Problem is the car is rarely driven. No jump starts or dead starts. The car is 2 hours away from me so this weekend I plan to dig a little deeper, thanks again
11-06-2023, 07:52 AM
