Severity: Fix within days. Drive with caution and watch for new symptoms.
The electrical system voltage has risen above the level the computer expects, which usually means the alternator's voltage regulator is failing.
Test the alternator output and the voltage regulator, and check the ground connections.
Overvoltage can damage electronics. Get the charging system tested soon.
You can drive short distances carefully; watch for worsening symptoms. Overvoltage can damage electronics. Get the charging system tested soon.
The most common causes are: Failing alternator voltage regulator; Damaged wiring; Bad ground connection; Failing battery. A scan tool and a visual check of the parts above is where a technician starts.
Test the alternator output and the voltage regulator, and check the ground connections.
