P0193: Fuel rail pressure sensor circuit high
The ECU sees a voltage that is too high from the rail pressure sensor. Usually a broken ground wire, a loose connector or a failed sensor.
| Code | P0193 |
|---|---|
| System | Engine and transmission |
| Group | P01xx, Air and fuel metering |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P0193 means
High input means the sensor voltage is above what is possible, as if the pressure were higher than the system can produce. It is almost always an electrical fault, often an open circuit in the sensor ground. The ECU usually limits power because it cannot trust the reading.
Most common causes
- Loose, corroded or unplugged sensor connector
- Broken sensor ground wire
- Signal wire touching a positive feed
- Faulty fuel rail pressure sensor
- ECU fault (rare)
Symptoms
- Engine warning light on
- Limp mode with reduced power
- Hard starting
- Hesitation or stalling
Can you drive with P0193?
With care You can drive with care, but power may be limited and the engine may cut out. Have it checked soon.
Open the bonnetthe in-depth explanation
How to check it
With the ignition on and the engine off, look at rail pressure on the reader: a very high value without the engine having turned means the signal is wrong. Check the connector and the sensor ground wire.
How to read and clear P0193 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P0193 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P018F The fuel pressure relief system activates too frequently
- P0190 Fuel rail pressure sensor circuit malfunction
- P0191 Fuel rail pressure sensor range or performance problem
- P0192 Fuel rail pressure sensor circuit low
- P0194 The fuel rail pressure sensor (bank 1) fails now and then
- P0195 The engine oil temperature sensor is not working properly
- P0196 The engine oil temperature sensor gives readings outside the normal range
- P0197 The engine oil temperature sensor gives a lower signal than normal
- P0100 Mass or volume air flow sensor circuit fault
- P0101 Air flow sensor range or performance problem
- P0102 Air flow sensor circuit low input
- P0103 Air flow sensor circuit high input
What does code P0193 mean?
High input means the sensor voltage is above what is possible, as if the pressure were higher than the system can produce. It is almost always an electrical fault, often an open circuit in the sensor ground. The ECU usually limits power because it cannot trust the reading.
Can you drive with P0193?
You can drive with care, but power may be limited and the engine may cut out. Have it checked soon.
How do you clear P0193?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P0193 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
