Battery Voltage Above Normal, Recessive
The system has detected battery voltage that is higher than normal levels.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is seeing battery voltage levels above 16 volts, which can happen if there's a charging system issue or a faulty battery.
What the computer is actually seeing
The engine control module (ECM) monitors battery voltage and detects values over 16.0 volts as abnormal.
What a healthy reading looks like
Normal battery voltage should be between 12.6V (at rest) and 14.5V (during charging).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check battery terminals for corrosion and ensure they are tight. If corroded, clean and tighten.
- 22. Measure battery voltage with a multimeter: should read between 12.6V (off) and 14.5V (running). If above 16.0V, go to step 3.
- 33. Inspect the alternator output at the battery while the engine is running. It should not exceed 14.5V. If it does, suspect a faulty alternator.
- 44. Check the voltage regulator's operation. You may need to test or replace it if the alternator is functioning correctly but voltage is still high.
- 55. Inspect wiring to the battery and alternator for damage or shorts. Repair any issues found.
Common causes
- Faulty voltage regulator
- Bad alternator
- Battery failure
- Corroded battery terminals
- Damaged wiring or connectors
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address it quickly since high voltage can damage electronic components.
Will this code come back if I clear it?
It may return if the underlying issue isn't fixed.
Why does this code sometimes pair with others?
High voltage can affect other systems, leading to multiple trouble codes appearing.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →