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.
2012 Ford Fiesta S, Standard TransFACTORY OEM SERVICE PROCEDURE
Charging System DTCS
CHARGING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTCs | Description | Source | Action |
|---|---|---|---|
| P065B:09 | Generator Control Circuit Range/Performance: Component Failure | PCM | INSTALL a new generator. Refer to Generator . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. |
| P065C:09 | Generator Mechanical Performance: Component Failure | PCM | GO to Pinpoint Test D . |
| P0A3B:09 | Generator Over Temperature: Component Failure | PCM | INSTALL a new generator. Refer to Generator . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. |
| P1794:16 | Battery Voltage Circuit: Circuit Voltage Below Threshold | PCM | GO to Pinpoint Test B . |
| P1794:17 | Battery Voltage Circuit: Circuit Voltage Above Threshold | PCM | GO to Pinpoint Test A . |
| U0120:13 | Lost Communication with Starter/Generator Control Module: Circuit Open | PCM | GO to Pinpoint Test C . |
| U0469:09 | Invalid Data Received From Starter/Generator Control Module: Component Failure | PCM | INSTALL a new generator. Refer to Generator . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | PCM | GO to Pinpoint Test B . |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | PCM | GO to Pinpoint Test A . |
| All other DTCs | - | Various Modules | REFER to the ELECTRONIC ENGINE CONTROLS or the INTRODUCTION - GASOLINE MODELS . If directed to this information from another service information, GO to Symptom Chart . |
Factory Service Tools
Use the Manual With the Right Hardware
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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.