Fuel Pressure Sensor Circuit Low
The fuel pressure sensor signal is lower than expected.
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What it means (plain English)
The fuel pressure sensor is sending a signal to the computer that indicates the fuel pressure is too low, which could mean it's not able to deliver enough fuel to the engine properly.
What the computer is actually seeing
The vehicle's computer expects the fuel pressure to be within a specified range, typically 30-70 psi during operation, but it's seeing values under this threshold, often below 5 psi.
What a healthy reading looks like
Fuel pressure should typically be around 55 psi in normal operating conditions; anything below 30 psi may indicate a problem.
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's above 1/4 tank.
- 22. Inspect wiring and connectors leading to the fuel pressure sensor for damage or corrosion; repair as necessary.
- 33. Use a fuel pressure gauge; connect it to the fuel rail and check actual fuel pressure: it should be around 55 psi.
- 44. If fuel pressure is low, check the fuel pump operation: listen for pump sounds when turning the key to ON (engine not running).
- 55. If purring sound is not heard, check the fuel pump relay and fuse; replace if blown or faulty.
- 66. If fuel pressure is good but the code persists, replace the fuel pressure sensor.
Common causes
- Faulty fuel pressure sensor
- Clogged fuel filter
- Fuel pump failure
- Wiring issues to the sensor
- Low fuel levels or poor fuel quality
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive for a short distance, but performance may be affected and running too low on fuel can harm the fuel pump.
Will this code come back after repairs?
If the underlying issue is fixed, the code should not return.
Why does this code pair with other codes?
Fuel system codes often relate to each other, as they can stem from similar issues like fuel pressure problems affecting multiple components.
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