Battery Current Sensor (BPS) Voltage Signal Low
The battery current sensor is reporting a low voltage signal.
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)
Inside the battery management system, the battery current sensor monitors the voltage and current going in and out of the battery. When it detects a low voltage signal, it thinks there's an issue with how much power is being sent to or from the battery.
What the computer is actually seeing
The vehicle's computer is receiving a voltage signal from the battery current sensor that drops below an expected threshold, typically around 0.1 volts when the system is active.
What a healthy reading looks like
Expected signal voltage from the battery current sensor should be between 0.5V and 4.5V under normal operating conditions.
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. Inspect the wiring and connector at the battery current sensor for any damage or corrosion. If damaged, repair or replace as necessary. Decision Point: Are the connections good?
- 22. Measure the voltage at the battery current sensor while the vehicle is running. Expected voltage should be between 0.5V and 4.5V. Decision Point: Is the voltage within the expected range?
- 33. If the voltage is low, check the state of charge of the battery. Ensure it’s above 12.4 volts at rest. Decision Point: Is the battery charged properly?
- 44. If the battery is good, replace the battery current sensor. Decision Point: Did replacing the sensor fix the issue?
Common causes
- Bad battery current sensor
- Poor connection at the sensor or wiring
- Battery faults or low state of charge
- Faulty ECM or BCM programming
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
While it may be drivable, it's important to address this issue soon to avoid potential battery failure and electrical system problems.
Will this code come back after clearing?
If the underlying issue isn't resolved, such as a bad sensor or connection, the code will likely return.
Why does this code pair with other battery-related codes?
Many battery-related codes share circuits or symptoms, so one issue can trigger others, indicating broader battery or electrical system problems.
Working a real vehicle right now?
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