U1491 Code - Implausible Fuel Level 2 Signal Received
Quick Answer
The U1491 code indicates that the fuel level signal received by the vehicle's onboard computer is implausible or incorrect. Common causes include Faulty fuel level sensor, Wiring issues or corroded connections, Damaged fuel pump. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U1491 indicates Implausible Fuel Level 2 Signal Received.
- Common causes
- Common causes include Faulty fuel level sensor, Wiring issues or corroded connections, Damaged fuel pump.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code U1491 Description
The U1491 code indicates that the fuel level signal received by the vehicle's onboard computer is implausible or incorrect. This can lead to a variety of issues with the vehicle's fuel system, affecting its performance and efficiency. The fuel level sensor is responsible for sending information to the computer about the amount of fuel in the tank, allowing the driver to monitor fuel levels on the dashboard. When the signal received is inaccurate, it can cause the fuel gauge to display incorrect readings, leading to confusion for the driver and potentially causing the vehicle to run out of fuel unexpectedly.
Common Causes of U1491
- Faulty fuel level sensor
- Wiring issues or corroded connections
- Damaged fuel pump
- Malfunctioning computer module
Symptoms of U1491
- Inaccurate fuel level readings on the dashboard
- Fluctuating fuel gauge readings
- Engine misfires or stalling
- Poor fuel efficiency
How to Fix U1491
- Diagnose the issue by using a diagnostic scanner to read the code and check the fuel level sensor's functionality.
- Inspect the wiring and connections for any signs of damage or corrosion.
- Replace the fuel level sensor if it is found to be faulty.
- Test the fuel pump and computer module for proper operation and replace if necessary.
- Clear the code from the computer's memory and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix U1491
The typical repair costs for addressing the U1491 code can vary depending on the specific cause of the issue. Replacing a faulty fuel level sensor can cost between $150 and $300, while addressing wiring issues or replacing the fuel pump or computer module can range from $200 to $500 or more. Labor costs can add an additional $80 to $150 per hour, and the total cost can vary based on the vehicle make and model, as well as the location and the repair shop's labor rates. It's advisable to consult a professional mechanic for a more accurate estimate based on the specific circumstances.
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Code U1491 Information for Specific Makes
- U1491 Chrysler — Implausible Fuel Level 2 Signal Received
- U1491 Dodge — Implausible Fuel Level 2 Signal Received
- U1491 Jeep — Implausible Fuel Level 2 Signal Received
- U1491 RAM — Implausible Fuel Level 2 Signal Received
Frequently Asked Questions about U1491 Code
What does the OBDII code U1491 mean?
U1491 indicates an "Implausible Fuel Level 2 Signal Received," meaning the engine control module (ECM) has detected an inconsistency or error in the fuel level sensor readings.
What are the common symptoms of the U1491 code?
Common symptoms include inaccurate fuel gauge readings, warning lights on the dashboard, and potential issues with fuel-related performance, such as stalling or poor fuel efficiency.
What could cause the U1491 code to trigger?
Causes can include a faulty fuel level sensor, damaged wiring or connectors, issues with the ECM, or problems with the fuel tank itself.
How can I diagnose the U1491 code?
Start by checking the fuel level sensor and its wiring for damage or loose connections. Use a multimeter to test the sensor's resistance and compare it to the manufacturer's specifications.
Can I drive my vehicle with the U1491 code?
While it may be possible to drive with this code, it's not recommended, as it may lead to poor fuel management and performance issues.
What are some common repairs for the U1491 code?
Common repairs include replacing the faulty fuel level sensor, repairing or replacing damaged wiring or connectors, and reprogramming or replacing the ECM if necessary.
How can I clear the U1491 code after repairs?
You can clear the code using an OBD-II scanner. After making repairs, disconnect the battery for a few minutes or use the scanner to reset the check engine light.
Should I replace the fuel level sensor if the U1491 code appears?
Not necessarily; first, conduct a thorough diagnosis to rule out wiring issues or ECM faults before replacing the fuel level sensor.
How can I prevent the U1491 code from reappearing?
Regular maintenance and inspections of the fuel system, including the fuel level sensor and wiring, can help prevent issues that may trigger the U1491 code.
Discuss the causes and fixes for U1491 OBDII Code
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