Fuel Pressure Sensor Circuit Low
The fuel pressure sensor is reporting a low voltage or failure.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Inside the computer, the fuel pressure sensor sends a voltage signal that reflects the fuel pressure in the system. A low voltage reading means the sensor is either malfunctioning or the pressure is genuinely low due to a lack of fuel.
What the computer is actually seeing
The computer expects a voltage between 0.5V to 4.5V, with 2.5V indicating normal pressure. If it sees below around 0.2V, it triggers the fault code.
What a healthy reading looks like
Fuel pressure should be between 50 to 100 psi while the engine is running; the sensor's output should be approximately 2.5V.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the fuel level in the tank; ensure it's above 1/4 full.
- 2Check the wiring and connector to the fuel pressure sensor for any damage or corrosion.
- 3Measure the voltage output from the fuel pressure sensor; it should be between 0.5V and 4.5V.
- 4If the voltage is below 0.2V or not within expected range, replace the fuel pressure sensor and retest.
- 5If the voltage is normal, check fuel pressure at the rail using a gauge; it should be within 50-100 psi.
Common causes
- Faulty fuel pressure sensor
- Wiring issues or damaged connector
- Low fuel level in the tank
- Fuel pump failure
- Blocked fuel filter
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Driving is possible but not recommended, as it may lead to fuel pressure issues that could stall the engine.
Will this code come back after clearing it?
Yes, if the underlying issue isn't fixed, the code will return.
Why would this code pair with low fuel pressure codes?
It indicates that the sensor is detecting an actual low fuel pressure condition.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →