FUEL SUMP PRESSURE
Fuel sump pressure is outside the expected range.
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What it means (plain English)
The fuel sump pressure sensor is reporting a value that isn't right, which can mess with the engine's fuel delivery.
What the computer is actually seeing
The engine control unit (ECU) is monitoring the fuel sump pressure sensor. It expects a specific pressure range (usually 15-32 psi) while the engine is running. If the value is outside this range, it triggers the code.
What a healthy reading looks like
Expected fuel sump pressure values are typically between 15-32 psi during normal operation.
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 adequate and there are no air pockets.
- 22. Inspect the wiring and connectors for the fuel pressure sensor. Look for corrosion, breaks, or poor connections.
- 33. Using a scan tool, read the actual fuel sump pressure value. It should be within 15-32 psi while the engine is running.
- 4 - If it is within range, the problem might be intermittent; continue monitoring.
- 5 - If it is out of range, proceed to the next step.
- 64. Replace the fuel filter if it hasn't been done recently (usually every 30k miles) as a clogged filter can affect pressure.
- 75. If the filter is good, test or replace the fuel pressure sensor; a faulty sensor will give incorrect readings.
- 86. Finally, if the pressure is still off, check the fuel pump operation and fuel lines for leaks or blockages.
Common causes
- Clogged fuel filter
- Faulty fuel pressure sensor
- Fuel pump issues
- Leaking fuel lines
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but fix soon to avoid fuel delivery issues that can cause stalling.
Will this code return after a repair?
If the underlying issue is fixed, the code should not come back.
Why does this code pair with SPN 3044?
SPN 3044 typically relates to the fuel pressure sensor performance, which can be affected by the same conditions causing SPN 3045.
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