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P0A77
Generator Phase W Current High
Generic · battery
Data confidence
78%
The control module detected that the current in the Generator Phase W circuit was above the expected range.
TuningBot DTC Database · v4.37.15
P0A77 Generator Phase W Current High
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P0A77 means
Related and nearby codes
How to read P0A77
P
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
A77
Specific fault index within the subsystem.
Frequently asked questions about P0A77
What does P0A77 mean?
Generator Phase W Current High. The control module detected that the current in the Generator Phase W circuit was above the expected range.
Is P0A77 generic or manufacturer-specific?
P0A77 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0A77 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic