The control module judged the Fuel Rail Pressure signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Symptoms
Possible hard starting or long cranking
Possible reduced power or cutting out
MIL illuminated
Possible causes
Wiring
FRP sensor
Recommended checks
Read specified vs actual rail pressure at cranking, idle and load
Check low-pressure supply (pressure/volume) first
Check control valve/regulator operation
Measure injector return flow where applicable
Inspect wiring and connectors of pressure components
The cited OEM bulletin documents P0191:00 for Genesis in the stated vehicle and controller context. It identifies fuel rail pressure sensor circuit range/performance; the bulletin-specific condition must not be generalized to other platforms or modules.
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
191
Specific fault index within the subsystem.
Frequently asked questions about P0191
What does P0191 mean?
Fuel Rail Pressure Sensor Circuit Range/Performance. The control module judged the Fuel Rail Pressure signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Is P0191 generic or manufacturer-specific?
P0191 exists both as a generic OBD-II code (same meaning on every make) and with 1 manufacturer-specific interpretation(s): Genesis. Always read it in the context of your vehicle.
Can TuningBot remove P0191 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.
ItalianoIT
DeutschDE
EspañolES
PortuguêsPT
FrançaisFR
РусскийRU
Genesis