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P01A9
Alternative Fuel Rail/System Pressure - Too High
Generic · engine
Data confidence
65%
The control module detected that the Alternative Fuel Rail/System Pressure value was above the expected limit.
TuningBot DTC Database · v4.37.15
P01A9 Alternative Fuel Rail/System Pressure - Too High
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P01A9 means
Related and nearby codes
How to read P01A9
P
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
1A9
Specific fault index within the subsystem.
Frequently asked questions about P01A9
What does P01A9 mean?
Alternative Fuel Rail/System Pressure - Too High. The control module detected that the Alternative Fuel Rail/System Pressure value was above the expected limit.
Is P01A9 generic or manufacturer-specific?
P01A9 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P01A9 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