P058CBattery Monitor Module Temperature Monitoring Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Check engine light on
- Battery warning light (FCA case)
- Stop-start inactive
- Likely causes
- LikelyBattery sensor faulty internally (temperature)
- PossibleSensor supply interrupted (fuse, connector)
- RareHeat from contact resistance at the terminal
- RareSoftware
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €5 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.