Fuel Pressure Sensor Circuit Low
This code indicates the fuel pressure sensor is reporting a low voltage.
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)
The fuel pressure sensor measures how much pressure is in the fuel system to make sure the engine gets enough fuel. If it reads too low, the engine might not run properly.
What the computer is actually seeing
The PCM sees a voltage below the expected level from the fuel pressure sensor, typically below 0.5 volts when it should be around 0.5 to 4.5 volts depending on the pressure.
What a healthy reading looks like
Normal fuel pressure is usually around 40-60 PSI, and the sensor should output a voltage between 0.5-4.5 volts.
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.
- 11. Check the wiring and connector to the fuel pressure sensor for signs of wear or damage. Look for shorts or broken wires.
- 22. Verify fuel pressure at the fuel rail using a gauge; it should read between 40-60 PSI. If it's low, the fuel pump may be faulty.
- 33. Measure the voltage at the fuel pressure sensor connector; it should be 0.5 to 4.5 volts with the key on. If not, check for power and ground at the connector.
- 44. If the wiring and voltage are good, replace the fuel pressure sensor and clear the code.
Common causes
- Faulty fuel pressure sensor
- Wiring issues (shorts, open circuits)
- Bad fuel pump
- Contaminated fuel system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive with this code, as low fuel pressure can lead to engine performance issues.
Will this code return after repairing?
If the issue is addressed properly, the code should not return. Ensure to check for proper connections and functionality.
Why might this code pair with SPN 5261 or SPN 5262?
These codes relate to fuel pressure readings at different ranges, indicating sensor issues or pressure anomalies.
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 →