Fuel Pump Secondary Circuit Range/Performance Problem
There's an issue with the fuel pump's power or performance.
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 is not delivering enough fuel pressure or isn't working correctly, which can lead to engine performance problems like stalling or hard starting.
What the computer is actually seeing
The engine control module (ECM) expects a certain voltage or frequency signal from the fuel pump sensor. When it receives a signal outside the expected range—typically below 10 volts or over 16 volts—it triggers this code.
What a healthy reading looks like
The fuel pump should operate within a voltage range of 12-14 volts with good fuel flow and pressure around 30-60 psi depending on the system.
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 the fuel level in the tank; fill if low.
- 2Inspect wiring and connectors from the fuel pump for damage or corrosion.
- 3Test the fuel pump voltage while the engine is running; should be 12-14 volts.
- 4Check the fuel pressure with a gauge; should be within expected range (30-60 psi).
- 5If electrical tests pass but pressure is low, replace the fuel pump.
Common causes
- Faulty fuel pump
- Damaged wiring or connectors
- Failed fuel pump relay
- Clogged fuel filter
- Low fuel level
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix this soon; driving with low fuel pressure can lead to stalling.
Will this code come back after clearing?
It might if the underlying issue isn't fixed.
Why does this code sometimes pair with P0230?
P0230 relates to the fuel pump relay, indicating that the pump may not be getting power.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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