P058C code meaning
Battery Monitor Module Temperature Monitoring Performance
Powertrain system Generic code P05xx codes Check engine light
What P058C means
The battery monitor module (intelligent battery sensor) sits on the negative terminal of the 12 V battery: a shunt measures current, electronics also measure voltage and temperature and calculate state of charge, health and cranking ability, reporting over LIN. Energy management uses the data for alternator control, idle boost and stop-start release, which is why the engine module diagnoses it. GM sets P058A–P058F in its engine modules from 2016 as type B, warning lamp after two trips. P058C concerns temperature measurement, which stands in for battery temperature in the charge voltage. GM compares two raw temperature values and sets it above 10 °C difference in 8 of 10 samples, also on values stored during sleep. FCA uses it too: on a 2016 Dodge Journey a blown 10 A fuse in the module supply set P058C with the battery light.
P058C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.2 to 1 hours
- Clears after repairAfter a drive cycle
Symptoms of P058C
- Check engine light on
- Battery warning light (FCA case)
- Stop-start inactive
Common causes of P058C
- Most likelyBattery sensor faulty internally (temperature)
- PossibleSensor supply interrupted (fuse, connector)
- Less likelyHeat from contact resistance at the terminal
- Less likelySoftware
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Battery monitor moduleBattery terminalLin busEngine control module
What each part of P058C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 8C | The exact fault in that area. |
What to do next
- Note P058C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P058C
What does P058C mean?
P058C means "Battery Monitor Module Temperature Monitoring Performance". The battery monitor module (intelligent battery sensor) sits on the negative terminal of the 12 V battery: a shunt measures current, electronics also measure voltage and temperature and calculate state of charge, health and cranking ability, reporting over LIN. It is a generic code, so it means the same on every make.
Is it safe to drive with P058C?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P058C fail an emissions test?
Yes, it can. P058C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P058C to fix?
Difficulty: easy. A typical repair takes 0.2 to 1 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P058C clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.