DTC Detection Logic
WARNING: This page is about a different car, the 2012 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
| DTC No. |
Trouble diagnosis name |
DTC detecting condition |
Possible cause |
| P0191 |
Fuel rail pressure sensor |
Fuel rail pressure remains at more than 14.5 MPa (147.9 kg/cm2
, 2102.5 psi) for 0.2 seconds or more during ignition ON. |
- Harness or connectors
(Fuel rail pressure sensor circuit is open or shorted.)
(Power steering pressure sensor circuit is open or shorted.)
(Low fuel pressure sensor circuit is open or shorted.)
(The electrically-controlled cooling fan coupling circuit is open or shorted)
- Fuel rail pressure sensor
- Power steering pressure sensor
- Low fuel pressure sensor
- Electrically-controlled cooling fan coupling
|