Error code
OBD2 P0194
OBD2P0194
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Fuel Rail Pressure Sensor Circuit Intermittent.
Severity
moderateCan drive, but with reduced performance and efficiency.
Summary
P0194 indicates an intermittent issue with the fuel rail pressure sensor circuit on your vehicle's high-pressure fuel injection system.
Symptoms
- Loss of power
- Decreased fuel economy
Common Causes
- Fuel rail pressure sensor failure due to heat and vibration
- Poor connections in wiring harnesses or connectors
- Corrosion in electrical components
Diagnosis
- Check for obvious damage in wire harnesses and connectors
- Test continuity and resistance of circuit lines
- Backprobe the sensor or ECM to check voltage against specifications
Fixes
- Replace faulty fuel rail pressure sensor if necessary
FAQ
What does P0194 mean?
It indicates an intermittent issue with the fuel rail pressure sensor circuit, affecting engine performance and efficiency.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0100Mass or Volume Air Flow Circuit
- P0101Mass or Volume Air Flow Circuit Range/Performance
- P0102Mass or Volume Air Flow Circuit Low Input
- P0103Mass or Volume Air Flow Circuit High Input
- P0104Mass or Volume Air Flow Circuit Intermittent
- P0105Manifold Absolute Pressure/Barometric Pressure Circuit
- P0106Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance
- P0107Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
- P0108Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- P0109Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
- P0110Intake Air Temperature Sensor 1 Circuit
- P0111Intake Air Temperature Sensor 1 Circuit Range/Performance