Fuel Level Sensor "A" Circuit Intermittent/Erratic
What it means
The engine computer has detected that the fuel level sensor signal drops out or jumps suddenly in a way that does not match normal fuel movement in the tank. This usually points to a poor connection in the connector or wiring, or a worn resistor track inside the sensor.
Related lights
Dashboard lights that may come on with this code.
Symptoms4
- Fuel gauge fluctuates or jumps between values.
- Low fuel warning turns on and off for no clear reason.
- Check engine light on, possibly going off and coming back.
- Hard to rely on the gauge to judge remaining fuel.
Possible causes5
- Worn resistor track in the sensor, losing signal at certain levels.
- Loose connector on top of the tank or corroded terminals.
- Partly broken wire affected by vibration.
- Weak ground point.
- Fault in the instrument cluster or the module that reads the sensor (less common).
How to diagnose5
- Watch the fuel level reading as a graph on a scan tool while driving.
- Note whether the jumps happen at a certain fuel level, which points to a worn sensor.
- Gently move the connector and wiring while watching to find the poor connection.
- Check the ground and connector terminals.
- Measure sensor resistance while slowly moving the float if the unit is removed, looking for sudden dropouts.
How to fix5
- Clean and tighten the connector terminals or replace the connector.
- Repair and secure the damaged wire.
- Repair the weak ground point.
- Replace the sensor, or the pump module it is built into, if the resistor track is worn.
- Clear the codes and watch that the fuel gauge stays steady.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
In the Saudi market: SAR 100–1,500 (≈ USD 27–400)
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 small when cleaning a connector or repairing a ground fixes it, and rises when the sensor or pump module must be replaced.
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
Is some gauge movement in corners normal?
Slight movement as fuel sloshes can be normal, but the computer sets this code when jumps are faster or larger than normal fuel movement.
Should I replace the sensor right away?
Check the connector and ground first. If the jumps always happen at the same fuel level, a worn sensor is most likely.
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