Excessive heat around the battery or monitor module from the engine bay, an exhaust component or a missing heat shield; Poor connection at the battery terminal or monitor module, such as a loose clamp, corrosion or high resistance heating the unit; Overcharging, or an alternator or charging control fault causing the battery to overheat; Failing or ageing battery with high internal resistance, running hot under charge or load; Faulty battery monitor module or internal temperature sensor giving a false high reading; Damaged wiring, connector or data link between the monitor module and the control unit; Cooling or ventilation fault for a battery that has its own cooling, depending on the vehicle.

P058E

Battery Monitor Module Temperature Too High.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
5: AreaVehicle speed, idle control and auxiliary inputs
8E: FaultThe specific fault in that area

What it means

P058E means the control unit has seen a temperature reported by the battery monitor module that is higher than the allowed limit. The module may be a sensor on the battery terminal or an electronic unit that tracks battery state of charge and health. The exact location, temperature threshold and the system it protects vary by model and engine, so check the manufacturer's data for the vehicle.

Symptoms

Warning light on, possibly with a battery or charging system message
Stop-start system disabled or not working
Battery state of charge reading wrongly, or the battery not charging properly
Reduced electrical features, or the alternator output limited
Hard starting or a flat battery
Other battery or charging fault codes stored alongside

Possible causes

Excessive heat around the battery or monitor module from the engine bay, an exhaust component or a missing heat shieldlikely
Poor connection at the battery terminal or monitor module, such as a loose clamp, corrosion or high resistance heating the unitlikely
Overcharging, or an alternator or charging control fault causing the battery to overheatpossible
Failing or ageing battery with high internal resistance, running hot under charge or loadpossible
Faulty battery monitor module or internal temperature sensor giving a false high readingpossible
Damaged wiring, connector or data link between the monitor module and the control unitrare
Cooling or ventilation fault for a battery that has its own cooling, depending on the vehiclerare

How to diagnose

Read all stored codes and freeze frame data, and note the conditions when the fault set and whether other battery or charging codes are present
Check by feel and sight whether the battery and monitor module are physically hot, and look for melted plastic, heat damage or a missing heat shield or cover
Inspect the battery terminals, earth strap, monitor module connector and wiring for looseness, corrosion, chafing or heat damage
Test the battery condition and state of health with a suitable battery tester, and check for any recent battery replacement that needed registering
Measure the charging voltage at idle and under load against the manufacturer's specification to check for overcharging
Compare the module's reported temperature with a measured temperature of the battery once the engine has cooled and when it is hot
Check the manufacturer's data for the module's operating limits and any known faults or software updates for this model
Check the module's power, earth and communication circuits for voltage drop or faults before condemning the module

How to fix

Repair or replace any missing or damaged heat shielding, ducting or cooling provision around the battery and module
Clean and tighten the battery terminals and earth connections, and repair or replace damaged wiring or connectors
Repair or replace the alternator or charging regulation components if the charging voltage is out of specification
Replace the battery if it is failing, and register or code the new battery to the vehicle if the manufacturer requires it
Replace the battery monitor module if it is confirmed faulty, and apply any updated calibration the manufacturer lists for a known fault

Can I keep driving?

Medium severity

Short journeys are usually possible if the battery is not physically hot, but get it checked soon, as overheating or overcharging can damage the battery. If the battery smells, swells, leaks or is very hot, stop driving and have the vehicle recovered.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.