Fuel Pump Control Circuit Low
Indicates a fault in the fuel pump control circuit due to low voltage.
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 computer is trying to talk to the fuel pump but isn't getting enough voltage back to show it's working properly.
What the computer is actually seeing
The ECM expects the fuel pump control circuit to operate with voltage levels around 12 to 14 volts; anything below that indicates a problem.
What a healthy reading looks like
Fuel pump control voltage should be between 12V and 14V; if below 5V, it triggers SPN 2246.
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 battery voltage; should be between 12V and 14V. If low, charge or replace battery.
- 2Inspect the fuel pump wiring for damage or corrosion. Repair as necessary.
- 3Test voltage at the fuel pump connector; should read 12V+ during operation. If not, check circuit continuity back to the ECM.
- 4Check for loose or corroded connectors at the fuel pump and ECM. Repair any found issues.
- 5If all checks pass, suspect a faulty ECM. Replace and reprogram if needed.
Common causes
- Faulty fuel pump
- Damaged wiring harness
- Loose or corroded connectors
- ECM issues
- Blown fuse
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, the vehicle may stall or not start due to fuel pump issues.
Will this code come back?
If the underlying issue isn't fixed, yes, it will return.
Why does this code pair with SPN 1231?
Both codes relate to fuel delivery issues, indicating potential failures in the fuel system.
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 →