Fuel Pump "A" Control Circuit Low
What it means
The engine computer (ECU) detected lower than expected voltage on the fuel pump control circuit. This usually comes from a control wire shorted to ground or a damaged relay coil, and it can stop the pump or make it work incorrectly.
Related lights
Dashboard lights that may come on with this code.
Symptoms4
- Hard starting or no start.
- Stalling or hesitation under load.
- Check engine light on.
- Repeatedly blown fuel pump fuse at times.
Possible causes5
- Control circuit wire shorted to the body or ground through worn insulation.
- Damaged fuel pump relay coil.
- Moisture or corrosion in connectors, especially near the tank or under the vehicle.
- Faulty fuel pump control module on vehicles that have one.
- Faulty control circuit inside the engine computer (rare).
How to diagnose5
- Check the pump fuse, and if it is blown, find the short to ground before replacing it.
- Swap in an identical known-good relay to test.
- Measure the resistance between the control wire and ground with both ends disconnected.
- Inspect wiring under the vehicle and near the tank for chafing or damage.
- Measure control voltage at the relay or pump module while it is commanded on.
How to fix5
- Repair the wire shorted to ground and re-insulate and secure it.
- Replace the pump relay if its coil is damaged.
- Clean corroded connectors and protect them from moisture.
- Replace the pump control module if proven faulty.
- Clear the codes and confirm the pump runs and the code does not return.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
In the Saudi market: SAR 50–1,800 (≈ USD 13–480)
Our prices come from the Saudi market, converted at a fixed rate (SAR 3.75 per USD). Prices in your country may differ a lot, so we show the cost level.
The cost is low for a wire repair or relay, and rises if a pump control module or a new pump is needed.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026
Frequently asked questions
Why does the fuel pump fuse keep blowing?
Usually because of a wire shorted to ground or a damaged relay coil, and the cause must be repaired before fitting a new fuse.
Is this code serious?
Yes, because it can stop the pump suddenly and stall the engine while driving, so repair it as soon as possible.
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