P058F

What it means

P058F means the control unit has seen a temperature reading from the battery monitor module that is below the expected range. The module measures battery temperature along with voltage and current to work out state of charge, so the reading may be genuinely cold or may come from a faulty sensor, wiring or the module itself. Which temperature is monitored, and the exact threshold, depends on the vehicle and the battery type.

Symptoms

• Warning light on (engine, battery or charging system, depending on the vehicle)
• Stop-start system disabled or working less often
• Charging strategy changes, with reduced electrical load management or odd voltage readings
• Hard starting or a slow crank if the battery is weak or cold
• Battery state-of-charge display shows odd or missing values
• Other battery or charging fault codes stored alongside

Possible causes

• Genuinely very cold battery or ambient temperature, especially after a cold soaklikely
• Faulty battery monitor module or its internal temperature sensor giving a falsely low readinglikely
• Damaged, corroded or loose wiring or connector at the monitor module or its sensor circuitpossible
• Poor battery terminal connection or corrosion affecting the module's readingspossible
• Failing or heavily discharged battery causing implausible monitor readingspossible
• Communication fault or software issue between the module and the control unit, where a known outdated calibration is documentedrare

How to diagnose

1. Read all stored codes and freeze frame data, noting the ambient temperature, engine coolant temperature and battery voltage at the time the code set
2. Check whether the code only appears after a cold start in low temperatures and whether it clears as the vehicle warms up
3. Visually inspect the battery monitor module, its connector and wiring for damage, corrosion, water ingress and rubbing
4. Check the battery terminals and earth connections for tightness and corrosion
5. Test the battery state of health and the charging system output, following the manufacturer's procedure
6. Compare live data for the module's temperature reading with a known ambient or battery temperature measured independently
7. Check wiring continuity and for shorts in the sensor and communication circuits against the wiring diagram
8. Check for related codes and any manufacturer service bulletins or software updates for your model

How to fix

• Repair or replace damaged wiring, connectors or terminals found during inspection
• Clean and tighten the battery terminals and earth connections
• Replace the battery monitor module or its sensor if the readings are implausible and the wiring is good, then complete any adaptation or registration the manufacturer requires
• Replace a weak or failing battery and register it if the vehicle requires this
• Apply a manufacturer-issued software update only if a documented calibration fault applies to your vehicle

Can I keep driving?

Nearby codes

• P058EGenericBattery Monitor Module Temperature Too High
• P0590GenericCruise Control Multi-Function Input B Circuit Stuck