Battery Saver Active Causes And Fixes (Chevrolet And GM)

Battery Current Sensor

The battery current sensor informs the onboard computer (ECM/PCM), that there is more current flowing out of the battery than in.

When more amps are flowing out, the ECM sees a charging issue and goes into battery saver active mode.

If the sensor goes bad or does not have a good connection, it will give an error.

Test the vehicle while running with a meter to see what the volts are.

It is above 13.5-volts while running the charging system is usually good, and there is likely a problem with the sensor.

If the voltage is lower than 13-volts DC, there is likely a problem with the charging system.

Alternator

If the alternator goes bad and stops charging, it will cause a battery saver active message.

The alternator can be tested with a meter while running for voltage.

If the voltage is lower than 13.5-volts, there is a problem with the alternator charging.

Be sure to look at the belt that drives the alternator as it can break and not spin the unit.

Once removed, an alternator can also be tested at many auto parts stores.

Be sure to call around first to see which store one can test it for you.

Alternator Belt

The alternator belt spins the battery, which allows it to charge the battery.

If the belt breaks or fails, it will not spin the alternator, which will cause it not to work.

Check the belt and be sure it is tight on the alternator and not loose.

If it is loose, it may need o to be replaced.

Battery Cable Terminals

Bad or loose battery terminals can cause issues even if they look good.

Take them off and examine them to be sure they are good or need to be replaced.

Often they can be cleaned with a wire brush to get a good contact on a terminal.

Bad Battery

Usually, the problem is something else, but a bad battery can cause problems with the charging system.

A battery can be put in a charger to see if it holds a charge, or can be taken to an auto parts store which will charge and test it.