Powertrain, generic · Vehicle speed, idle control and auxiliary inputs

P058E Battery Monitor Module Temperature Too High

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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. P058E means the module reports a temperature above its plausible range: GM sets it above 120 °C in 4 of 5 samples. As the outside temperature must lie between −20 and 50 °C, such a value points to a sensor fault or strong local heating from contact resistance at the terminal or shunt. It suspends P058C.

Likely causes

Battery sensor faulty internally
High contact resistance at terminal or ground ring heating the sensor
Missing battery heat shield after repair

Symptoms

  • Check engine light on
  • Stop-start inactive
  • Possibly discoloured or scorched terminal

Repair estimate

DifficultyEasyDIY possible
Parts and labour€60–250
Time0.3–1 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

battery monitor modulebattery terminallin busengine control module

Related codes

P058FP058CP058AP058BP058D

References: gsi.ext.gm.com, gsi.ext.gm.com, techtips.ie.