So yesterday my check engine light started flashing occasionally while driving. I pulled the code and it showed 1231 (Battery Voltage/DME). With the car off my battery voltage is 12.8V and with the car running, its right around 16V! I pulled the alternator to have it tested at AutoZone and it passed. I also inspected the voltage regulator brushes and they look okay. Aside from the check engine light, the car runs okay. Any ideas?
-
-
The voltage regulator in the alternator is bad. Max system voltage should be close to 14.5v.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL -
New alternator fixed it! Don't trust AutoZone alternator testers. Thanks, Jim.Comment
-
They probably tested if it was not making enough, not too much.Comment
Comment