Power Supply Circuit Low Voltage
Indicates a low voltage condition in the power supply circuit for the body control module.
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 body control module isn't getting enough voltage to work properly, which can happen if there's a weak battery, bad wiring, or a failing module.
What the computer is actually seeing
The body control module detects voltage below the normal operating range (usually below 9 volts) on its power supply line over several cycles.
What a healthy reading looks like
Ideal operating voltage should be between 12.5 to 14.5 volts when the engine is 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 voltage; it should be above 12.5 volts with the engine off and between 13.5 to 14.5 volts with the engine running. If not, address the battery issue first.
- 22. Inspect all wiring and connectors related to the body control module. Look for corrosion, breaks, or loose connections. Repair as necessary.
- 33. Measure the voltage at the body control module power input pin. If it's below 9 volts with the engine running, proceed to the next step.
- 44. If voltage is normal at the module but the code persists, consider testing or replacing the body control module.
Common causes
- Weak or discharged battery
- Corroded or damaged wiring in the power supply circuit
- Faulty body control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be drivable, but expect issues with vehicle functions controlled by the body control module.
Will the code come back after clearing?
It may return if the underlying issue (battery, wiring, module) is not addressed.
Why does this code appear with other codes?
Other codes may indicate related electrical problems, often linked to low voltage or ground issues.
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