AutoCodes – Jeep – U1403 Jeep

U1403 Jeep Code - Implausible Fuel Level Signal Received

Quick Answer

The Fuel Level Sensor signal is a direct input to the Body Control Module (BCM). Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module circuit poor electrical connection. 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 Jeep indicates Implausible Fuel Level Signal Received.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module circuit poor electrical connection.
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 Popularity 12,786

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1403 Jeep Description

The Fuel Level Sensor signal is a direct input to the Body Control Module (BCM). The BCM transmits the fuel level message to the Powertrain Control Module (PCM) over the Controller Area Network (CAN) C bus. The Diagnostic Trouble Code (DTC) sets when the fuel level message that the Powertrain Control Module (PCM) is receiving is implausible. The circuit is continuously monitored.

OBDII Code U1403 Jeep - Implausible Fuel Level Signal Received - AutoCodes.com — U1403 Jeep Code - Implausible Fuel Level Signal Received

What does this mean?

What are the Possible Causes of the DTC U1403 Jeep?

Faulty Powertrain Control Module (PCM)
Powertrain Control Module harness is open or shorted
Powertrain Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1403 Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1403 Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U1403 Jeep code?

Need more information on how to fix the U1403 Jeep code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 Jeep Code

1. What are common symptoms of an U1403 Jeep OBDII code?

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

2. What causes the U1403 code in a Jeep?

- The U1403 code is typically triggered by issues such as a faulty fuel level sensor, wiring problems in the fuel level sensor circuit, or a malfunctioning instrument cluster.

3. How serious is the U1403 code in a Jeep?

- While the U1403 code may not cause immediate drivability issues, it can lead to inaccurate fuel level readings, potentially causing inconvenience and confusion for the driver.

4. Can I continue driving my Jeep with the U1403 code?

- It is generally safe to continue driving your Jeep with the U1403 code, but it is recommended to address the issue promptly to avoid running out of fuel unexpectedly.

5. How do I diagnose the U1403 code in my Jeep?

- Diagnosing the U1403 code involves using an OBDII scanner to retrieve the code, inspecting the fuel level sensor and its wiring, and testing the functionality of the instrument cluster.

6. What are some repair tips for the U1403 code in a Jeep?

- Repair tips include checking and cleaning the fuel level sensor connections, inspecting for damaged wiring, replacing a faulty fuel level sensor, and resetting the code after repairs are made.

7. Can a DIY enthusiast fix the U1403 code in a Jeep?

- Depending on their skill level, a DIY enthusiast may be able to address the U1403 code by following repair guides, but professional help is recommended for complex electrical issues.

8. How much does it cost to repair the U1403 code in a Jeep?

- The cost of repairing the U1403 code in a Jeep can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Will the U1403 code reset itself after repairs?

- In some cases, the U1403 code may reset itself after repairs are made and the underlying issue is resolved. If it does not reset, it can be cleared using an OBDII scanner.

10. Is the U1403 code specific to Jeep vehicles?

- The U1403 code is specific to Jeep vehicles and indicates an implausible fuel level signal received, which may differ in interpretation across different car manufacturers.