ZappaZeek Posted 3 hours ago Share Posted 3 hours ago My 2013 c180 has been intermittently displaying warnings on the dashboard regarding problems with the ABS and ESP systems, as well as the TPMS system. I expected the battery to be higher after only 15 hours of not driving the car, so I checked it using this site and found that it was 11.9 volts. After that, I purchased a Kingbolen OBD2 module, performed diagnostic tests, and the results are attached to this report. I cleared the codes and ran the test again, but the problems persisted. Based on this, I'm considering that the issues could be caused by the battery, with or without the exception of the wheel speed sensor, which likely needs replacing. I have already tested the actuation tests for the steering column, wipers, etc., and they all worked without faults. I have never replaced the battery in a vehicle less than two years ago, so I have no idea how old this one is. Since the car is stop-start, I am also unsure about which battery to get and whether or not it requires coding. Link to comment Share on other sites More sharing options...
NightHawk47 Posted 3 hours ago Share Posted 3 hours ago If I were in charge, I'd check the alternator charging rate against the battery. Unacceptably low at 11.9 volts. Typically, the terminals of the battery will bear the date of manufacture. Link to comment Share on other sites More sharing options...
TheCreakyChair Posted 3 hours ago Share Posted 3 hours ago The voltage of 11.7 volts is not low enough to produce these problems on its own. While a dead battery may theoretically lead to ABS/ESP/BAS/TPMS error signals, the voltage you recorded isn't high enough to be the culprit. Usually it's the clock spring (Steering Wheel Position Sensor) or a wheel speed sensor that I wager on, rather than the battery. Having said that, it's likely worth replacing a battery that measures 11.7v overnight before it starts creating trouble. Link to comment Share on other sites More sharing options...
Lemmand Posted 3 hours ago Share Posted 3 hours ago There isn't much juice left in high-demand scenarios when the voltage is 11.7 volts, which is less than 30% charged. I can see how it may be low enough to cause problems; it did on mine when I was at a comparable voltage. Also, my automobile usually started the first time, but eventually it stopped. I had to get a new one because it was probably around fifteen years old. Link to comment Share on other sites More sharing options...
Lemmand Posted 3 hours ago Share Posted 3 hours ago Link to comment Share on other sites More sharing options...
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