Fuel Pump Pressure Too Low
Indicates that the fuel pump pressure is below the specified threshold.
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 pump isn't pushing enough fuel to the engine. This can mean it's failing or there's a blockage in the fuel system.
What the computer is actually seeing
The engine control module (ECM) monitors fuel pressure via a sensor. It expects a pressure signal between 4-6 bar (58-87 psi). If the pressure drops below that, the ECM sets this code.
What a healthy reading looks like
Fuel pressure should typically be between 4-6 bar (58-87 psi) during engine 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.
- 1Check fuel level in the tank to ensure there is adequate fuel.
- 2Inspect fuel pump wiring and connectors for damage or corrosion.
- 3Using a fuel pressure gauge, measure the fuel pressure; it should be between 4-6 bar (58-87 psi). If it’s low, proceed to the next step.
- 4Replace the fuel filter if it hasn't been changed recently (usually every 30,000 miles).
- 5If the filter is fine, check for voltage and ground at the fuel pump connector while cranking the engine; you should see around 12 volts. If no voltage, trace wiring back to the relay and ECM.
- 6If voltage is present and pressure is still low, replace the fuel pump.
Common causes
- Faulty fuel pump
- Blocked fuel filter
- Leaking fuel line or fittings
- Faulty fuel pressure sensor
- Electrical issue in the fuel pump circuit
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not advisable to drive long distances as low fuel pressure can lead to poor engine performance or stalling.
Will this code come back after repair?
If the root cause is fixed (like replacing a faulty pump), the code shouldn't return.
Why does this code often pair with other codes?
Low fuel pressure can affect multiple systems; other codes may show issues like injector performance or misfires.
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 →