P0193
Fuel Rail Pressure Sensor Circuit High Input
The ECU reads a voltage from the fuel rail pressure sensor above the calibrated maximum, indicating short to power or open ground reference.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
What we see in the workshop
ON FORD ECOBOOST
Fuel rail pressure sensor high input on a direct-injection engine can be the sensor or a genuine pressure control fault. We log live data before replacing parts.
Common causes
Ordered by how often each turns out to be the cause.
- Signal wire shorted to batteryCommon
- Open ground referencePossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Fuel Rail Pressure Sensor
- Wiring Harness
P0193 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.