Pinpoint Test F : DTC P0A5A, P0A5B, P0A5C: Notes
WARNING: This page is about a different car, the 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Charging System for schematic and connector information.
Normal Operation and Fault Conditions
The generator current sensor is a Hall-effect sensor attached to the generator B+ cable. It is supplied a 5 volt reference and ground from the PCM. The PCM reads the generator current sensor feedback voltage to determine how much current is flowing through the generator B+ cable.
Diagnostic Trouble Code (DTC) Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0A5A | Generator Current Sensor Circuit Range/Performance | This DTC sets in the PCM when the PCM does not detect current through the generator current sensor and there are no generator current sensor circuit Diagnostic Trouble Codes (DTCs) set. |
| P0A5B | Generator Current Sensor Circuit Low | This DTC sets in the PCM when the PCM senses lower than expected voltage on the generator current sensor feedback circuit, indicating an open or a short directly to ground. |
| P0A5C | Generator Current Sensor Circuit High | This DTC sets in the PCM when the PCM senses higher than expected voltage on the generator current sensor feedback circuit, indicating a short directly to voltage. |
Possible Sources
- Generator current sensor
- PCM
- Wiring, terminals or connectors
Visual Inspection and Diagnostic Pre-checks
- Inspect the generator current sensor.
- Inspect the generator current sensor connector.