Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test G : DTC U3003:16: Notes
Pinpoint Test G: DTC U3003:16Â
Diagnostic OverviewÂ
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Wiring Diagrams Grounds , for schematic and connector information.
Refer to Wiring Diagrams Power Distribution/BCM , for schematic and connector information.
Normal Operation and Fault ConditionsÂ
DTC Fault Trigger ConditionsÂ
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | Sets in the BCM when the BCM detects that battery voltage has dropped below 9 volts from the voltage supply circuit. |
Possible SourcesÂ
- Wiring, terminals or connectors
- Battery
- Generator
- PCM
- RFA module
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.