P0192: Fuel Rail Pressure Sensor Circuit Low Input
Can you still drive? Drive with caution. If fuel pressure is actually low, the engine may stall unexpectedly, especially under load or at highway speeds.
What Does P0192 Mean?
Code P0192 indicates that the fuel rail pressure sensor is reporting a pressure reading that is below the expected minimum range. The ECM uses this sensor to regulate fuel injection pressure, and a low input signal can lead to improper fuel delivery. This code is especially common on direct injection and diesel fuel systems.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty fuel rail pressure sensor
- Low actual fuel pressure from a weak pump
- Clogged fuel filter restricting flow
- Short to ground in sensor wiring
- Leaking fuel injector reducing rail pressure
Symptoms
- Check engine light on
- Hard starting or no start
- Loss of power under load
- Engine stalling
- Rough idle
Diagnostic Steps
- 1Read freeze frame data and compare sensor reading to actual fuel pressure with a gauge
- 2Check fuel pressure with a mechanical gauge at the rail
- 3Inspect the sensor connector and wiring for damage
- 4Test the fuel pump output pressure and volume
- 5Check the fuel filter for restriction
- 6Replace the sensor if mechanical pressure is within spec
Recommended Parts & Tools
fuel rail pressure sensor
fuel pressure gauge
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $150 - $800 |
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Frequently Asked Questions
Can a clogged fuel filter cause P0192?
Yes, a restricted fuel filter can reduce fuel rail pressure below the expected range, triggering this code. Replacing the fuel filter is a good first step.
Is P0192 always a sensor problem?
No, P0192 can be caused by an actual low-pressure condition from a failing fuel pump or clogged filter. Always verify actual fuel pressure before replacing the sensor.
Can P0192 cause a no-start condition?
Yes, if fuel rail pressure is critically low, the engine may crank but fail to start, especially on direct injection engines.
Community Fix Reports
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