The control module detected an interruption (open circuit) in the Alternative Fuel Tank Select Valve C Control circuit, so the expected electrical continuity was not present.
TuningBot DTC Database · v4.37.15
P2A99 Alternative Fuel Tank Select Valve C Control Circuit/Open
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P2A99 means
Related and nearby codes
How to read P2A99
Powertrain: engine, transmission and driveline systems.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Frequently asked questions about P2A99
What does P2A99 mean?
Alternative Fuel Tank Select Valve C Control Circuit/Open. The control module detected an interruption (open circuit) in the Alternative Fuel Tank Select Valve C Control circuit, so the expected electrical continuity was not present.
Is P2A99 generic or manufacturer-specific?
P2A99 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P2A99 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
