Battery Voltage Sense Signal Circuit Low
The battery voltage signal is lower than expected.
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 system is detecting that the battery's voltage is lower than what it should be, typically around 12 volts when the engine is off and over 13.5 volts when running.
What the computer is actually seeing
The vehicle's computer is seeing a voltage reading from the battery that is consistently below 11 volts. This can trigger other faults related to power distribution.
What a healthy reading looks like
Battery voltage should be 12-12.6 volts (engine off) and 13.5-14.5 volts (engine running).
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 the battery terminals for corrosion and ensure they are tight.
- 22. Measure the battery voltage at rest (should be 12-12.6V). If low, charge or replace the battery.
- 33. Start the engine and measure the voltage again (should be 13.5-14.5V). If low, check the alternator output.
- 44. Inspect the wiring and connectors between the battery and PCM/BCM for damage or loose connections.
- 55. If all checks are good, consider testing or replacing the body control module.
Common causes
- Corroded battery terminals
- Weak battery
- Faulty alternator
- Wiring issues to the battery
- Faulty body control module (BCM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but you may experience electrical issues as the battery may not be charging properly.
Will the issue come back after clearing the code?
If the underlying issue isn't fixed, the code will likely return.
Why does this code sometimes come with B160A?
Both codes relate to battery voltage problems, but B160A indicates a different aspect or threshold of the battery's voltage.
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 →