Fuel Pump 'A' Control Circuit/Open
There's an issue with the fuel pump control circuit.
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 isn't getting the signals it needs to operate the fuel pump, which means the engine might not get enough fuel to run.
What the computer is actually seeing
The Engine Control Module (ECM) monitors the voltage and current in the fuel pump control circuit. It expects to see a specific voltage (typically 12-14 volts) when the ignition is on, and it requires a stable current draw from the pump during operation.
What a healthy reading looks like
Expected voltage at the fuel pump connector should be between 11.5-14.5 volts with the ignition on. When the pump is running, current should typically be around 2-10 amps depending on the pump size.
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 pump fuse for continuity; if blown, replace and retest. Decision: If fuse blows again, investigate further.
- 2Inspect the fuel pump wiring and connectors for damage or corrosion; repair or replace as necessary. Decision: If wiring is good, move to next step.
- 3Test the fuel pump relay for correct operation; swap with a similar relay if available. Decision: If relay fails the test, replace it and recheck code.
- 4Measure voltage at the fuel pump connector with the ignition on; you should see 11.5-14.5 volts. Decision: If voltage is missing, check the harness back to the ECM.
Common causes
- Open or shorted fuel pump harness
- Bad fuel pump relay
- Faulty ECM
- Poor ground connection
- Blown fuse in the fuel pump circuit
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle if I see this code?
You might be able to drive it short distances but expect a risk of stalling or no-start due to inadequate fuel supply.
Will this code come back after I clear it?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code sometimes appear with other codes?
They may share common wiring or components affecting the fuel system, causing more than one code to trigger.
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