Fuel Pressure Sensor Circuit Low
The fuel pressure sensor circuit is reporting a voltage lower than expected.
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What it means (plain English)
The computer thinks the fuel pressure is too low because the sensor is sending a weak signal, which could mean there's not enough fuel or a problem with the sensor itself.
What the computer is actually seeing
The engine control module (ECM) expects fuel pressure readings between 200 to 400 kPa (about 29 to 58 psi), but is receiving a voltage drop indicating less than 0.5 volts from the sensor.
What a healthy reading looks like
Expected fuel pressure sensor voltage is between 0.5 volts (low pressure) to 4.5 volts (high pressure) when the engine is running.
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; refill if low.
- 22. Inspect wiring and connectors at the fuel pressure sensor for damage or corrosion; repair as needed.
- 33. Using a multimeter, measure voltage at the fuel pressure sensor; expect 0.5-4.5 volts with the engine running.
- 44. If voltage is below 0.5 volts, check for open circuits between the sensor and ECM.
- 55. If wiring is good and voltages are correct, replace the fuel pressure sensor and retest.
Common causes
- Damaged wiring or connector to the fuel pressure sensor
- Faulty fuel pressure sensor
- Low fuel levels or fuel delivery issue
- Blocked fuel filter
- Fuel pump failure
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be drivable, but reduced performance and fuel efficiency can occur. Get it checked soon.
Will this code come back after resetting?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code pair with fuel delivery issues?
Because low fuel pressure directly affects performance; it can trigger this fault code.
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