Quote:
Originally Posted by SleepyHead98
Autoparts stores can check alternators for free. Even alot of mom and pop alternator shops can test it. The codes lead me to believe yes the alternator is bad since the battery code. But it also depends on the battery, its age and the volts it has. A good battery should be around 12.5-12.8 volts. Use a multimeter to test the voltage on the battery.
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If they have a multimeter, they can check the alternator output themselves.