ItalianoIT
DeutschDE
EspañolES
PortuguêsPT
FrançaisFR
РусскийRU
P2391
Diesel Intake Air Flow B Control Performance
Generic · engine
Data confidence
65%
The control module judged the Diesel Intake Air Flow B Control behaviour implausible for the current operating conditions.
TuningBot DTC Database · v4.37.15
P2391 Diesel Intake Air Flow B Control Performance
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P2391 means
Related and nearby codes
How to read P2391
P
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
391
Specific fault index within the subsystem.
Frequently asked questions about P2391
What does P2391 mean?
Diesel Intake Air Flow B Control Performance. The control module judged the Diesel Intake Air Flow B Control behaviour implausible for the current operating conditions.
Is P2391 generic or manufacturer-specific?
P2391 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P2391 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