OBD-II DTC · SAE J2012
P0299
Turbocharger/Supercharger "A" Underboost Condition
What P0299 means
P0299 is a standard SAE J2012 powertrain diagnostic trouble code with the defined meaning: Turbocharger/Supercharger "A" Underboost Condition. This is the OEM-agnostic definition; specific manufacturer interpretation may add detail (subsystem, bank, sensor location) but the core meaning is consistent across all OBD-II compliant vehicles since 1996.
Can this code be suppressed via ECU tuning?
Generally NOT recommended to suppress without fixing the underlying issue. Boost-related DTCs often indicate genuine turbo or wastegate problems that warrant inspection.