P0192 Fuel rail pressure sensor circuit low (bank 1)
What P0192 means
The voltage from the fuel rail pressure sensor is lower than the engine computer considers possible, as if there were almost no pressure in the rail. The computer cannot regulate rail pressure precisely and may limit power; on some diesels the engine is hard to start.
P0192 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.
At a glance
- Severity
- Medium
- Typical repair cost
- 80–300 €
- Workshop time
- 0.5–2 h
- Repair difficulty
- Medium
- DIY possible
- Yes
- Check engine light
- Yes
- Affects emissions test
- Yes
Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.
Symptoms
- Check engine light on
- Reduced power or limp mode
- Hard starting or long cranking
- Possible stalling
Common causes
- Failed fuel rail pressure sensor
- Signal wire shorted to ground
- Open circuit in the 5 V reference to the sensor
- Corroded or loose connector on the rail
Can I keep driving with P0192?
You can usually drive, but have it checked within one to two weeks. If the engine loses power or becomes hard to start, get it seen sooner.
What to check first
- Check the connector on the rail pressure sensor for corrosion, oil and loose pins.
- With the key on, measure the 5 V reference and ground at the sensor.
- Check the signal wire for a short to ground with the sensor unplugged.
- Replace the rail pressure sensor if the wiring is good.
Related codes
- P0191 Fuel rail pressure sensor circuit range/performance (bank 1)
- P0193 Fuel rail pressure sensor circuit high (bank 1)
- P0190 Fuel rail pressure sensor circuit (bank 1)
- P0181 Fuel temperature sensor A range/performance
- P0175 System too rich (bank 2)
- P0174 System too lean (bank 2)
- P0173 Fuel trim malfunction (bank 2)
- P0172 System too rich (bank 1)
Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
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