P058D code meaning
Battery Monitor Module Voltage Monitoring Performance
Powertrain system Generic code P05xx codes Check engine light
What P058D 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. P058D compares the module's voltage with the system voltage measured by the engine module itself: GM sets it above 5 V difference in 32 of 40 samples, its eAssist and stop-start engines at 2 V in 160 of 200. GM bulletins for the 2014–18 Malibu and Impala name loose terminals, ground faults and an overheating dual battery isolation module – with smoke or a burning smell.
P058D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.2 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P058D
- Check engine light on
- Stop-start inactive, battery or charge warning
- Rarely burning smell in the engine bay (GM)
Common causes of P058D
- Most likelyLoose or corroded terminal, ground ring or sensor connector
- PossiblePoor ground, loose splice, fault at the dual battery isolation module
- PossibleBattery sensor faulty
- Less likelyWeak main or auxiliary battery
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 P058D 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. |
| 8D | The exact fault in that area. |
What to do next
- Note P058D 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 P058D
What does P058D mean?
P058D means "Battery Monitor Module Voltage 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 P058D?
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 P058D fail an emissions test?
Yes, it can. P058D 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 P058D to fix?
Difficulty: easy. A typical repair takes 0.2 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P058D 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.