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U1403 Chrysler Code - Implausible Fuel Level Signal Received

Quick Answer

The U1403 Chrysler code indicates that the Engine Control Module (ECM) has detected an implausible signal from the fuel level sensor. Common causes include Faulty fuel level sensor, Damaged wiring or connectors related to the fuel level sensor, Malfunctioning ECM. 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
U1403 Chrysler indicates Implausible Fuel Level Signal Received.
Common causes
Common causes include Faulty fuel level sensor, Damaged wiring or connectors related to the fuel level sensor, Malfunctioning ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code U1403 Chrysler Description

The U1403 Chrysler code indicates that the Engine Control Module (ECM) has detected an implausible signal from the fuel level sensor. The fuel level sensor is responsible for sending the ECM information about the amount of fuel in the gas tank. When an implausible signal is received, it means that the ECM is unable to determine the accurate fuel level, which can lead to various issues with the vehicle's performance.

OBDII Code U1403 Chrysler - Implausible Fuel Level Signal Received
U1403 Chrysler Code - Implausible Fuel Level Signal Received

Common Causes of U1403 Chrysler

  1. Faulty fuel level sensor
  2. Damaged wiring or connectors related to the fuel level sensor
  3. Malfunctioning ECM
  4. Corrosion or debris in the fuel tank affecting sensor readings
  5. Electrical issues affecting the communication between the sensor and ECM

Symptoms of U1403 Chrysler

  1. Inaccurate fuel level readings on the dashboard gauge
  2. Fluctuating fuel level readings while driving
  3. Check Engine Light illuminated
  4. Engine performance issues such as hesitation or stalling

How to Fix U1403 Chrysler

  1. Diagnose the issue by using a scan tool to retrieve the U1403 code and perform testing on the fuel level sensor and related components.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Test the fuel level sensor for proper operation and replace if faulty.
  4. Clear the code from the ECM memory and perform a test drive to ensure the issue has been resolved.
  5. If the issue persists, further diagnostic testing may be required to pinpoint the exact cause of the problem.

Cost to Fix U1403 Chrysler

The typical repair costs for addressing the U1403 Chrysler code can vary depending on the root cause of the issue. In general, the cost of replacing a faulty fuel level sensor can range from $150 to $300, including parts and labor. However, if the issue is related to wiring or ECM malfunctions, the cost may be higher due to the additional diagnostic work required. It is advisable to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates at auto repair shops can vary between $80 and $150 per hour, with rates potentially higher in metropolitan areas or at dealerships.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U1403 Chrysler Code

1. What are the common symptoms of OBDII code U1403 in a Chrysler vehicle?

- Common symptoms include erratic fuel gauge readings, inaccurate fuel level display, and illumination of the check engine light.

2. What does the OBDII code U1403 "Implausible Fuel Level Signal Received" mean in a Chrysler?

- This code indicates that the vehicle's onboard computer has detected a discrepancy or inconsistency in the fuel level signal it is receiving.

3. What are the possible causes of the U1403 code in a Chrysler?

- The code could be triggered by a faulty fuel level sensor, wiring issues, a defective instrument cluster, or a problem with the vehicle's powertrain control module (PCM).

4. How can I diagnose the U1403 code in my Chrysler?

- Diagnosis typically involves checking the fuel level sensor and its wiring for any signs of damage or malfunction. A scan tool can also help pinpoint the exact cause of the issue.

5. Can driving with the U1403 code present cause any further damage to my Chrysler?

- While driving with this code may not immediately harm your vehicle, it is important to address the issue promptly to avoid potential fuel-related issues or inaccurate readings.

6. Is it safe to continue driving my Chrysler with the U1403 code illuminated?

- It is generally safe to drive the vehicle with this code, but it is recommended to have the issue diagnosed and repaired as soon as possible to ensure accurate fuel level readings.

7. How can I reset the U1403 code in my Chrysler?

- The code can be cleared using an OBDII scanner or by disconnecting the car's battery for a few minutes. However, the underlying issue should still be addressed to prevent the code from reoccurring.

8. Will the U1403 code in my Chrysler cause any impact on the vehicle's performance?

- This code typically does not affect the vehicle's performance directly, but it can cause inconvenience due to inaccurate fuel level readings.

9. How much does it typically cost to repair the U1403 code in a Chrysler?

- The repair cost can vary depending on the specific cause of the code. It may range from a simple sensor replacement to more complex wiring repairs, so it is best to consult a mechanic for an accurate estimate.

10. Can a DIY enthusiast fix the U1403 code issue in a Chrysler, or should I seek professional help?

- While some aspects of diagnosing and repairing the U1403 code can be tackled by DIY enthusiasts, it is recommended to seek professional help, especially for more complex issues like PCM or instrument cluster problems.

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