P0192: Fuel rail pressure sensor circuit low
The ECU sees a voltage that is too low from the rail pressure sensor. It is nearly always a wire shorting to ground, a connector or the sensor itself.
| Code | P0192 |
|---|---|
| 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 P0192 means
Low input means the sensor voltage is below what is possible, as if there were no pressure at all with the engine running. It is almost always an electrical fault. As the ECU does not know the real pressure, it usually cuts power to protect the engine.
Most common causes
- Loose, corroded or damp sensor connector
- Chafed signal wire shorting to ground
- Broken or shorted 5 volt supply wire
- Faulty fuel rail pressure sensor
- ECU fault (rare)
Symptoms
- Engine warning light on
- Limp mode with reduced power
- Hard starting or no start
- Stalling
Can you drive with P0192?
With care You can drive with care, but power may be heavily limited or the engine may cut out. Get it to a garage soon.
Open the bonnetthe in-depth explanation
How to check it
Check the live rail pressure: if it reads zero or close to zero with the engine running, the signal is wrong, since the engine could not run without pressure. Inspect the sensor connector before replacing any parts.
How to read and clear P0192 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 P0192 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
- P018E The fuel pressure sensor B fails now and then
- 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
- P0193 Fuel rail pressure sensor circuit high
- 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
- 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 P0192 mean?
Low input means the sensor voltage is below what is possible, as if there were no pressure at all with the engine running. It is almost always an electrical fault. As the ECU does not know the real pressure, it usually cuts power to protect the engine.
Can you drive with P0192?
You can drive with care, but power may be heavily limited or the engine may cut out. Get it to a garage soon.
How do you clear P0192?
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, P0192 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.
