Faulty battery current sensor or battery monitor module; Damaged or corroded wiring or connectors in the current sensor circuit; Poor ground connection at the battery monitor module or sensor; Software or calibration issue in the battery monitor module; Failed battery causing abnormal current readings; Alternator output issues affecting current monitoring

DTC codes / P05xx · Vehicle speed, idle control and auxiliary inputs / P058B

P058BBattery Monitor Module Current Monitoring Performance

Q: What does code P058B mean?

Battery Monitor Module Current Monitoring Performance. P058B indicates that the battery monitor module has detected an abnormal current monitoring performance, meaning the current sensor or its circuit is not reporting the expected values to the module. The computer sets this code when the current monitoring signal falls outside the programmed acceptable range or is inconsistent with other battery parameters.

P058B indicates that the battery monitor module has detected an abnormal current monitoring performance, meaning the current sensor or its circuit is not reporting the expected values to the module. The computer sets this code when the current monitoring signal falls outside the programmed acceptable range or is inconsistent with other battery parameters.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Symptoms you may notice

Illumination of the battery warning light or service vehicle soon message on the dashboard
Intermittent electrical issues such as dimming lights or slow engine crank
Battery not charging properly or overcharging, leading to shortened battery life
Often no symptoms besides the warning light, especially if the fault is intermittent
Possible stored trouble codes in other modules related to voltage supply

Common causes, most likely first

Faulty battery current sensor or battery monitor module
Damaged or corroded wiring or connectors in the current sensor circuit
Poor ground connection at the battery monitor module or sensor
Software or calibration issue in the battery monitor module
Failed battery causing abnormal current readings
Alternator output issues affecting current monitoring

How to diagnose and fix it

Perform a visual inspection of the battery, current sensor, and related wiring for damage or corrosion
Check and clean battery terminals and ground connections to ensure good electrical contact
Use a scan tool to retrieve live data from the battery monitor module and compare current readings with expected values
Test the current sensor with a multimeter according to manufacturer specifications
Inspect the wiring harness between the sensor and module for continuity and shorts
Reprogram or recalibrate the battery monitor module if applicable
Replace the faulty current sensor or battery monitor module as needed

Battery current sensor faults often misdiagnosed

A weak or failing battery can cause the current sensor to report out-of-range values, setting P058B even when the sensor itself is fine.
Corroded or loose ground connections at the battery monitor module are a common cause that is frequently overlooked during diagnosis.
The code may be stored intermittently due to a poor connection that only acts up under certain conditions like vibration or temperature changes.
Replacing the battery without resetting the battery monitor system can lead to incorrect current monitoring and the code reappearing.

Can I keep driving with P058B?

You can generally continue driving with P058B, but avoid long trips or heavy electrical loads until the fault is repaired, as incorrect current monitoring may lead to battery drain or charging issues.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.