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U2627 Chevrolet Code - Reductant Control Module Lost Communication With Reductant Level Sensor

Quick Answer

The U2627 Chevrolet code indicates that the Reductant Control Module has lost communication with the Reductant Level Sensor. Common causes include Faulty Reductant Control Module, Defective Reductant Level Sensor, Wiring or connector issues between the control module and sensor. 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
U2627 Chevrolet indicates Reductant Control Module Lost Communication With Reductant Level Sensor.
Common causes
Common causes include Faulty Reductant Control Module, Defective Reductant Level Sensor, Wiring or connector issues between the control module and sensor.
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 05, 2024
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Code U2627 Chevrolet Description

The U2627 Chevrolet code indicates that the Reductant Control Module has lost communication with the Reductant Level Sensor. The Reductant Control Module is responsible for monitoring and controlling the level of diesel exhaust fluid (DEF) in the vehicle's emissions system. The Reductant Level Sensor is a component that measures the level of DEF in the tank and sends this information to the control module. When communication between these two components is lost, it can lead to issues with the proper functioning of the DEF system, potentially causing the vehicle to go into a reduced power mode or triggering the check engine light.

OBDII Code U2627 Chevrolet - Reductant Control Module Lost Communication With Reductant Level Sensor
U2627 Chevrolet Code - Reductant Control Module Lost Communication With Reductant Level Sensor

Common Causes of U2627 Chevrolet

  1. Faulty Reductant Control Module
  2. Defective Reductant Level Sensor
  3. Wiring or connector issues between the control module and sensor
  4. Corrosion or damage to the sensor or control module
  5. Software or programming issues within the control module

Symptoms of U2627 Chevrolet

  1. Check engine light illuminated
  2. Reduced engine power
  3. Poor fuel economy
  4. Difficulty starting the vehicle
  5. Emissions system malfunctions

How to Fix U2627 Chevrolet

  1. Diagnose the specific cause of the communication loss between the control module and sensor using a diagnostic scanner.
  2. Inspect the wiring harness and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the Reductant Level Sensor to ensure it is functioning properly, replacing it if necessary.
  4. Check the Reductant Control Module for any faults or malfunctions, replacing it if required.
  5. Clear the diagnostic trouble codes, reset the system, and perform a test drive to verify that the issue has been resolved.

Cost to Fix U2627 Chevrolet

The typical repair costs for addressing a U2627 Chevrolet code can range from $200 to $500, including parts and labor. However, the specific cost can vary based on the extent of the issue, the need for replacement parts, and labor rates at auto repair shops. It's recommended to consult with a professional mechanic to get an accurate estimate for your specific 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 U2627 Chevrolet Code

1. What are the common symptoms of OBDII code U2627 in a Chevrolet related to the Reductant Control Module?

- Common symptoms include the illumination of the Check Engine Light, poor fuel economy, and potential issues with the vehicle's emissions system.

2. What could cause the Reductant Control Module in a Chevrolet to lose communication with the Reductant Level Sensor?

- Potential causes include a faulty reductant level sensor, damaged wiring or connectors, software issues, or a malfunction within the control module itself.

3. How can I diagnose the source of the communication error between the Reductant Control Module and the Reductant Level Sensor in my Chevrolet?

- A thorough diagnostic scan using an OBDII scanner can help pinpoint the exact cause of the communication error. Checking the wiring, connectors, and sensor functionality is also recommended.

4. Is it safe to continue driving my Chevrolet with the U2627 OBDII code related to the Reductant Control Module issue?

- While the vehicle may still be drivable, it is recommended to address the issue promptly to prevent potential damage to the emissions system and ensure optimal vehicle performance.

5. Can I reset the U2627 code related to the Reductant Control Module issue in my Chevrolet without fixing the underlying problem?

- Resetting the code without addressing the root cause will likely result in the Check Engine Light reappearing once the system detects the ongoing communication error.

6. What are some repair tips for resolving the U2627 OBDII code in a Chevrolet?

- Start by inspecting the wiring and connectors for any damage or corrosion. Test the Reductant Level Sensor for proper functionality and consider reprogramming or replacing the Reductant Control Module if necessary.

7. Will fixing the U2627 code related to the Reductant Control Module issue in my Chevrolet improve fuel efficiency?

- Resolving the communication error can lead to improved fuel efficiency, as the proper functioning of the reductant system is crucial for optimal engine performance and emissions control.

8. Can a DIY enthusiast address the U2627 OBDII code related to the Reductant Control Module issue in a Chevrolet?

- DIY enthusiasts with automotive repair experience can attempt to diagnose and fix the issue, but it's recommended to consult a professional if unsure about the repair process.

9. How much can I expect to pay for repairing the U2627 code in a Chevrolet caused by communication loss with the Reductant Level Sensor?

- The cost of repairing the U2627 code can vary depending on the specific cause of the communication error, but it may involve sensor replacement, wiring repairs, or module reprogramming, with potential costs ranging from $100 to $500 or more.

10. Can the U2627 OBDII code related to the Reductant Control Module issue in a Chevrolet be a recurring problem?

- If the underlying issue is not properly addressed, the U2627 code may reoccur, emphasizing the importance of thorough diagnostics and effective repair to prevent future occurrences.

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