What does P0192 mean?
The fuel rail pressure sensor reads fuel pressure in the rail that feeds the injectors. On diesels and direct-injection gas engines, pressure can run from a few thousand psi to well over 25,000 psi, and the computer controls it closely.
The computer is seeing a signal voltage that is lower than the sensor should ever produce, so it is almost always an electrical problem rather than a mechanical one.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- Hard starting or no start
- Loss of power
- Stalling
Common causes
- Open in the 5 V reference wire
- Signal wire shorted to ground
- Unplugged or corroded connector
- Failed sensor
How to diagnose P0192
- With the key on, back-probe the connector: you should see about 5 V on the reference wire and a good ground (under 0.1 V drop).
- If reference and ground are good, check the signal wire for a short to ground with the connector unplugged.
- If the wiring checks out, the sensor itself is the likely fault.
- Compare commanded and actual rail pressure in live data.
- Check reference, ground and signal at the sensor.
How to fix it
- Repair wiring
- Replace the rail pressure sensor (on some engines it is part of the rail)
Estimated repair cost
Likely repairs for P0192 run from about $100 to $450, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Fuel rail pressure sensor | $150 - $450 |
| Wiring/connector repair | $100 - $400 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0192?
High severity
Can cause stalling or no-start, so fix it before relying on the vehicle.
P0192 FAQ
What does P0192 mean?
P0192 stands for "Fuel Rail Pressure Sensor "A" Circuit Low". The fuel rail pressure sensor reads fuel pressure in the rail that feeds the injectors.
Can I drive with a P0192 code?
Can cause stalling or no-start, so fix it before relying on the vehicle.
How much does it cost to fix P0192?
It depends on the cause. The likely repairs for P0192 range from about $100 to $450 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0192?
The most common causes are: open in the 5 V reference wire; signal wire shorted to ground; unplugged or corroded connector.