Fuel Pressure Sensor Voltage Out of Range
Indicates that the fuel pressure sensor voltage is outside the expected range.
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. If the voltage it sends to the engine control module (ECM) is too high or too low, that means something's wrong, like a sensor failure or a clogged fuel line.
What the computer is actually seeing
The ECM expects the fuel pressure sensor to send a voltage signal typically between 0.5V (low pressure) to 4.5V (high pressure) depending on the actual fuel pressure. Any reading outside this range triggers the code.
What a healthy reading looks like
Voltage from the fuel pressure sensor should be between 0.5V to 4.5V relative to fuel pressures (0-1000 kPa or 0-145 psi).
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. Inspect the wiring and connector to the fuel pressure sensor for signs of damage or corrosion.
- 22. Check the fuel pressure using a gauge at the fuel rail. It should read within the expected range of 200-600 kPa (29-87 psi) when the engine is running.
- 33. Disconnect the fuel pressure sensor and check the voltage at the connector with the key on, engine off. You should see a voltage between 0.5V and 4.5V. If not, there could be a wiring issue between the sensor and the ECM.
- 44. If voltage is within range but pressure reading is still out, replace the fuel pressure sensor.
- 55. Clear the code and do a road test to see if the code returns.
Common causes
- Faulty fuel pressure sensor
- Damaged wiring or connectors
- Clogged fuel filter or fuel line
- Fuel pump issues
- ECM software error
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, but you might experience poor performance or fuel delivery issues, so it's best to fix it soon.
Will this code come back after clearing it?
It might if the underlying issue isn't resolved, such as a faulty sensor or wiring problem.
Why does this code sometimes pair with codes SPN 0520 or SPN 0521?
Those codes are related to other fuel pressure issues, often indicating a systemic problem in the fuel system.
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 →