Fuel Pressure Sensor Circuit Low
The fuel pressure sensor is detecting a low voltage signal.
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 is supposed to send a reading of the fuel pressure to the engine control module (ECM). When it's below 0.5 volts, the ECM thinks there's a problem.
What the computer is actually seeing
The sensor input to the ECM is reading below 0.5 volts, indicating a potential low fuel pressure condition.
What a healthy reading looks like
The fuel pressure should be between 300 to 600 kPa at idle, which translates to voltages typically between 0.5 to 4.5 volts from the sensor.
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 fuel level in the tank; ensure it is above 1/4 tank.
- 22. Inspect the wiring and connectors at the fuel pressure sensor for damage or corrosion.
- 33. Test the fuel pressure with a gauge; it should meet expected values of 300 to 600 kPa.
- 44. Measure the voltage at the sensor connector while the engine is running; it should be between 0.5 to 4.5 volts.
- 55. If the voltage is below 0.5 volts, replace the sensor. If the pressure is low but the voltage is good, check the fuel pump.
Common causes
- Damaged fuel pressure sensor
- Wiring issues or faulty connectors
- Low fuel levels in the tank
- Fuel pump malfunction
- Contaminated fuel or blockage in lines
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
It's better to fix it soon as it can affect performance, but if the vehicle runs fine, you can drive it temporarily.
What happens if I ignore this fault?
Ignoring this code may lead to poor engine performance and increased emissions.
Why does this code sometimes appear with other fuel system codes?
Multiple fuel system codes may indicate a common issue such as a failing fuel pump or a widespread wiring issue.
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 →