DTC Detection Logic
NOTE:
- If DTC P0087 or P0090 is displayed with DTC P1197, first perform the trouble diagnosis for DTC P1197.
- DTC P0087 or P0090 may be displayed when running out of gas.
DTC DETECTION LOGIC CHART
| DTC No. |
Trouble diagnosis name |
DTC detecting condition |
Possible cause |
| P0087 |
High fuel pressure too low |
- Fuel rail pressure does not reach 1.3 MPa (13 bar, 13.3 kg/cm2
, 188.5 psi) at engine cold start [water temperature 5°C (41°F) -40C° (104°F)].
- Fuel rail pressure remains at 3.5 MPa (35 bar, 35.7 kg/cm2
, 507.5 psi) or less for 1 second or more during engine idle condition after cold start [water temperature 5°C (41°F) -40C° (104°F)].
- The following condition continues for 5 seconds or more after engine start (regardless of water temperature): Target fuel pressure - Actual fuel pressure ≥ 2.7 MPa (27 bar, 27.5 kg/cm2
, 392 psi)
|
- Harness or connectors (The fuel pump circuit is open or shorted.)
- Fuel system
|
| P0088 |
high fuel pressure too high |
- Fuel rail pressure remains at more than 16.5 MPa (165 bar, 168.3 kg/cm2
, 2392.5 psi) for 1 second or more during engine idle condition after cold start [water temperature 5°C (41°F) -40C° (104°F)].
- The following condition continues for 5 seconds or more after engine start (regardless of water temperature):Actual fuel pressure - Target fuel pressure ≥ 2.7 MPa (27 bar, 27.5 kg/cm2
, 392 psi)
|
| P0090 |
High pressure fuel pump performance |
- Fuel rail pressure remains at 1.5 MPa (15 bar, 15.3 kg/cm2
, 217.5 psi) or less for 3 seconds or more during engine rev.
- Fuel rail pressure remains at 18.5MPa (185 bar, 188.7 kg/cm2
, 2682.5 psi) or more for 0.3 seconds or more during engine rev.
|