FUEL PRESSURE - LOW
Indicates that the fuel pressure is below the expected level.
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What it means (plain English)
The fuel pressure sensor is detecting that the pressure in the fuel system is too low for efficient engine operation, likely below 10 psi when it should be over 25 psi during cranking.
What the computer is actually seeing
The engine control module looks for a fuel pressure signal from the sensor that should indicate a specific range. If the reading stays below the acceptable threshold, it triggers this code.
What a healthy reading looks like
The fuel pressure should typically be between 25 psi to 60 psi when the engine is running and at least 10 psi while cranking.
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 for any visible leaks in the fuel lines and around the fuel filter and pump.
- 22. Inspect the fuel filter for clogs; replace if necessary.
- 33. Measure the fuel pressure with a gauge. Should be between 25-60 psi while running.
- 44. If pressure is low, test the fuel pump operation; it should produce adequate pressure.
- 55. Inspect the electrical connectors and wiring of the fuel pressure sensor for damage or corrosion.
- 66. If all checks out and pressure is still low, consider replacing the fuel pressure regulator.
Common causes
- Clogged fuel filter
- Weak fuel pump
- Leaking fuel lines
- Faulty fuel pressure regulator
- Electrical issue with fuel pressure sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, it can lead to poor engine performance and potential stalling.
Will this code come back after fixing?
If all issues are properly repaired, it should not return.
Why does this code sometimes pair with low engine power?
Low fuel pressure can directly reduce engine performance, causing power loss.
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