ItalianoIT
DeutschDE
EspañolES
PortuguêsPT
FrançaisFR
РусскийRU
P0399
Cylinder 1 Pressure Sensor Circuit Intermittent/Erratic
Generic · engine
Data confidence
65%
The control module detected an unstable or intermittent signal in the Cylinder 1 Pressure circuit.
TuningBot DTC Database · v4.37.15
P0399 Cylinder 1 Pressure Sensor Circuit Intermittent/Erratic
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P0399 means
Related and nearby codes
How to read P0399
P
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
399
Specific fault index within the subsystem.
Frequently asked questions about P0399
What does P0399 mean?
Cylinder 1 Pressure Sensor Circuit Intermittent/Erratic. The control module detected an unstable or intermittent signal in the Cylinder 1 Pressure circuit.
Is P0399 generic or manufacturer-specific?
P0399 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0399 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