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U1140 Dodge Code - Lost Communication With Active Exhaust Valve 2

Quick Answer

The U1140 diagnostic trouble code (DTC) for Dodge vehicles indicates that there has been a communication loss with Active Exhaust Valve 2. Common causes include Faulty active exhaust valve actuator, Wiring or connector issues, ECM/PCM communication error. 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
U1140 Dodge indicates Lost Communication With Active Exhaust Valve 2.
Common causes
Common causes include Faulty active exhaust valve actuator, Wiring or connector issues, ECM/PCM communication error.
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 U1140 Dodge Description

The U1140 diagnostic trouble code (DTC) for Dodge vehicles indicates that there has been a communication loss with Active Exhaust Valve 2. This means that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a lack of communication with the active exhaust valve actuator or sensor associated with the second exhaust valve. The active exhaust system is responsible for controlling the exhaust flow, sound, and performance of the vehicle. Active exhaust valves can open or close based on driving conditions, throttle input, and other factors to optimize performance and sound.

OBDII Code U1140 Dodge - Lost Communication With Active Exhaust Valve 2
U1140 Dodge Code - Lost Communication With Active Exhaust Valve 2

Common Causes of U1140 Dodge

  1. Faulty active exhaust valve actuator
  2. Wiring or connector issues
  3. ECM/PCM communication error
  4. Exhaust system blockage
  5. Corrosion or damage to sensor or actuator

Symptoms of U1140 Dodge

  1. Check Engine Light illuminated
  2. Reduced engine performance
  3. Abnormal exhaust sound
  4. Poor fuel efficiency
  5. Rough idle

How to Fix U1140 Dodge

  1. Perform a visual inspection of the active exhaust valve components, wiring, and connectors for any visible damage or corrosion.
  2. Use a diagnostic scan tool to retrieve the specific fault codes and data related to the communication loss with Active Exhaust Valve 2.
  3. Test the active exhaust valve actuator and sensor for proper functionality and resistance.
  4. Check the ECM/PCM for any communication errors and reprogram if necessary.
  5. Repair or replace any damaged components, such as the actuator, sensor, wiring, or connectors, as needed.

Cost to Fix U1140 Dodge

The cost of repairing a U1140 code related to lost communication with Active Exhaust Valve 2 can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. Generally, the cost of parts such as an actuator or sensor can range from $100 to $300, while labor costs can add another $100 to $300. In total, the repair for this issue may cost between $200 and $600. It's important to note that diagnostic time and labor rates can vary, so it's advisable to consult with a trusted mechanic for a more accurate cost estimate based on your location and vehicle.

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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 U1140 Dodge Code

1. What are common symptoms of OBDII code U1140 in a Dodge indicating lost communication with active exhaust valve 2?

The common symptoms include poor engine performance, decreased fuel efficiency, and the active exhaust valve system not functioning properly.

2. What are some possible causes of OBDII code U1140 in a Dodge related to lost communication with active exhaust valve 2?

Potential causes include damaged wiring or connectors, a faulty exhaust valve actuator, a malfunctioning exhaust valve control module, or a communication error within the vehicle's network.

3. How can I diagnose the issue causing OBDII code U1140 in my Dodge with regards to lost communication with active exhaust valve 2?

Diagnosing the problem involves conducting a thorough inspection of the wiring and connectors, testing the exhaust valve actuator and control module, and using a diagnostic scanner to analyze the communication network for errors.

4. Can I continue driving my Dodge with OBDII code U1140 indicating lost communication with active exhaust valve 2?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the exhaust system and potentially impact engine performance.

5. What are the repair options for fixing OBDII code U1140 in a Dodge caused by lost communication with active exhaust valve 2?

Repair options may include repairing or replacing damaged wiring, connectors, the exhaust valve actuator, or the exhaust valve control module. It is advisable to consult a professional mechanic for an accurate diagnosis and repair.

6. How much does it typically cost to repair OBDII code U1140 in a Dodge related to lost communication with active exhaust valve 2?

The repair costs can vary depending on the specific cause of the issue and the extent of the repairs needed. Costs may range from a few hundred dollars to over a thousand dollars, including parts and labor.

7. Can a DIY enthusiast fix OBDII code U1140 in a Dodge caused by lost communication with active exhaust valve 2?

While some DIY enthusiasts may have the skills to diagnose and repair this issue, it is recommended to seek assistance from a professional mechanic due to the complexity of the exhaust system and electronic components involved.

8. How long does it typically take to repair OBDII code U1140 in a Dodge related to lost communication with active exhaust valve 2?

The repair time can vary based on the specific cause of the problem and the availability of parts. In general, the repair may take a few hours to a full day to complete.

9. Will resetting the OBDII code U1140 in my Dodge resolve the issue of lost communication with active exhaust valve 2?

Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the lost communication with the active exhaust valve 2. It is essential to address the root cause of the issue for a permanent solution.

10. Is OBDII code U1140 in a Dodge related to lost communication with active exhaust valve 2 a common issue?

While not as common as some other OBDII codes, issues with lost communication with active exhaust valves can occur in Dodge vehicles equipped with this system. Proper maintenance and timely repairs can help prevent such problems.

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