P0191-64: Fuel Rail Pressure Sensor A Circuit Range/Performance - Signal plausibility failure: Action
- Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check fuel rail pressure sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Using the manufacturer approved diagnostic system clear all stored DTCs using the `Diagnosis Menu' tab and retest
- Check and install a new fuel rail pressure sensor as required