Fuel Pressure Sensor Supply Voltage
Fuel pressure sensor is not receiving proper 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 needs a specific voltage, usually around 5 volts, but it's reading too low or too high.
What the computer is actually seeing
The engine control module (ECM) expects a stable 5V supply for the fuel pressure sensor; readings outside of 0.1V to 4.9V are flagged as errors.
What a healthy reading looks like
Fuel pressure should typically be between 40-60 PSI; supply voltage to the sensor should be 5V +/- 0.1V.
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 connectors to the fuel pressure sensor for damage or corrosion. Repair as needed. Decision: If damage is found, fix it and retest.
- 22. Verify supply voltage at the fuel pressure sensor connector with a multimeter. Expected: 5V +/- 0.1V. Decision: If voltage is incorrect, check the power source from the ECM.
- 33. If the wiring and voltage are correct, test the fuel pressure sensor's functionality. Resistance should typically be within manufacturer specifications. Decision: If the sensor is out of spec, replace it.
Common causes
- Poor wiring or connections to the fuel pressure sensor
- Faulty fuel pressure sensor
- Issues in the ECM affecting voltage output
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you can drive, but fix this soon to avoid performance issues.
Will this code come back after resetting?
Yes, if the underlying issue isn't fixed, it will likely return.
Why might this pair with other codes?
This code can trigger with others related to fuel system issues, like pressure discrepancies.
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 →