Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM
DTC P0191 Fuel Rail Pressure Sensor Circuit Range / Performance
DESCRIPTION
The ECM monitors the internal fuel pressure of the common rail using the fuel pressure sensor, and controls the suction control valve to regulate the common rail pressure to the target pressure determined by the ECM. The pressure sensor is a semiconductor that varies its electrical resistance when pressure is applied to its silicon chip. This sensor outputs a voltage in proportion to the common rail fuel pressure.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0191 | Voltage output of the fuel pressure sensor for the common rail is out of the standard range (1 trip detection logic) |
Fuel pressure sensor |
INSPECTION PROCEDURE
- HINT:
- If DTCs P0087, P0190, P0192, and P0193 are output simultaneously, the manifold absolute pressure sensor circuit may be open or shorted. Perform troubleshooting for those DTCs first.
| 1.CHECK OTHER DTC OUTPUT |
Connect the intelligent tester to the DLC3.
Turn the engine switch ON (IG) and turn the intelligent tester ON.
Enter the following menus: "Powertrain / Engine / DTC".
Read DTCs.
- Result:
Display (DTC output) Proceed to P0191 A P0191 and other DTCs B
- HINT:
- If codes other than P0191 are output, perform troubleshooting for those DTCs first.
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LEXUS IS250, IS220d / GSE20 ALE20