OBD-II Code · Sensors
P0192
Fuel Rail Pressure Sensor Low Input
Severity
medium
Worth booking. It costs fuel, emissions or comfort until it is fixed.
Can you drive it
Only if running normally
A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.
Indicative cost (USD)
$150–$400
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Rail pressure sensor low.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Likely causes
- Failed sensorMost common
- Wiring short
Read the full diagnostic procedureP0192 means the fuel rail pressure sensor signal voltage dropped below the calibrated low threshold, typically under 0.3 volts on a 0 to 5 volt senso…
P0192 means the fuel rail pressure sensor signal voltage dropped below the calibrated low threshold, typically under 0.3 volts on a 0 to 5 volt sensor that should idle around 0.5 to 1.0 volts and rise to 4.0 to 4.5 volts at maximum rail pressure.
Cheapest first
- scan live data and look at the FRP sensor voltage with key-on-engine-off; a reading pinned at 0.0 volts indicates the signal wire is shorted to ground or the sensor has lost its 5-volt reference.
- Back-probe the sensor's three wires and verify 5.0 volts on the reference pin and good ground (under 0.1 volts) on the return pin.
- If both are present and signal is still 0 volts, the sensor itself is faulty.
- If the 5-volt reference is missing, check for a shared-reference fault: many platforms run multiple sensors off one ECM reference circuit, and a shorted MAP or oil pressure sensor can collapse the bus and set P0192 alongside other codes.
- Caveat: never assume the sensor is bad until the 5-volt reference and ground are confirmed at the connector, since the part is often $150 to $400 and the wiring is free.
Vehicle-specific patternsFord EcoBoost 1.5L, 2.0L, and 2.3L (2013-2020 Fusion, Escape, Mustang) sees P0192 from FRP sensor connector pin fretting; cleaning the connector with…
Ford EcoBoost 1.5L, 2.0L, and 2.3L (2013-2020 Fusion, Escape, Mustang) sees P0192 from FRP sensor connector pin fretting; cleaning the connector with electrical contact cleaner clears the fault in many cases. GM 5.3L and 6.2L direct injection (2014-2019 Silverado, Tahoe, Suburban) sets P0192 from a failed FRP sensor on the driver-side fuel rail, addressed in GM Bulletin 18-NA-279.
- 2008-2017VW/Audi 2.0T TSI sets P0192 from HPFP fuel pressure sensor failure, sensor sold separately from the pump. Cummins ISB 6.7L (2007-2018 Ram HD, medium-duty) sees P0192 from rail pressure sensor failure or corroded connector.
Estimated repair$80 to $550.
Look up another code
P0192 — frequently asked
What does a P0192 code mean?
Rail pressure sensor low.
What causes a P0192 code?
Common causes: Failed sensor; Wiring short.
What are the symptoms of a P0192 code?
Typical symptoms: Check engine light.
Is it safe to drive with a P0192 code?
Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $150-$400.
How do I diagnose a P0192 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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