U1491
Implausible Fuel Level 2 Signal Received
U1491 is an OBD-II diagnostic trouble code meaning: Implausible Fuel Level 2 Signal Received. Common causes: malfunction of the second fuel level sensor, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Incorrect display of fuel level on the dashboard
- Flashing or non-functioning fuel level indicator
- Errors in calculating remaining mileage
- False low fuel warnings
- Inconsistency in fuel level readings after refueling
Causes
- Malfunction of the second fuel level sensor
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Problems with the fuel pump or float
- ECU Software Errors
How to Fix
- Check the continuity of the fuel level sensor circuit
- Test the resistance of the fuel level sensor
- Inspect connectors and contacts for corrosion
- Check the operation of the fuel pump and float
- Update ECU software if necessary
Related codes
FAQ
What does the U1491 code mean?
U1491 is an OBD-II diagnostic trouble code that indicates: Implausible Fuel Level 2 Signal Received
What causes a U1491 error code?
The most common causes of U1491 include: Malfunction of the second fuel level sensor; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Problems with the fuel pump or float.
How do I fix a U1491 diagnostic trouble code?
To fix U1491: Check the continuity of the fuel level sensor circuit. Test the resistance of the fuel level sensor. Inspect connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1491?
Yes, but get it checked soon
How much does it cost to fix U1491?
The estimated repair cost for U1491 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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