AutoCodes – Buick – U2627 Buick

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

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Reductant Level Sensor, Reductant Level Sensor harness is open or shorted, Reductant Level Sensor 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: U2627 Buick indicates Reductant Control Module Lost Communication With Reductant Level Sensor.
Common causes: Common causes include Faulty Reductant Level Sensor, Reductant Level Sensor harness is open or shorted, Reductant Level Sensor 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 550

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 Jun 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2627 Buick Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2627 Buick - Reductant Control Module Lost Communication With Reductant Level Sensor - AutoCodes.com — U2627 Buick Code - Reductant Control Module Lost Communication With Reductant Level Sensor

What does this mean?

What are the Possible Causes of the DTC U2627 Buick?

Faulty Reductant Level Sensor
Reductant Level Sensor harness is open or shorted
Reductant Level Sensor circuit poor electrical connection
Faulty Reductant Control Module

How to Fix the DTC U2627 Buick?

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 U2627 Buick 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.

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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 Buick Code

1. What are the common symptoms of OBDII code U2627 in a Buick?

The common symptoms of code U2627 include the Check Engine light coming on, reduced engine performance, and potential issues with the vehicle's emissions system.

2. What does the OBDII code U2627 in a Buick indicate?

OBDII code U2627 indicates that the Reductant Control Module has lost communication with the Reductant Level Sensor in the vehicle's emissions system.

3. What are the possible causes of the U2627 code in a Buick?

Possible causes of code U2627 include a faulty Reductant Level Sensor, damaged wiring or connectors in the system, or a malfunctioning Reductant Control Module.

4. How can I diagnose the U2627 code in my Buick?

Diagnosing the U2627 code typically involves using a diagnostic scanner to retrieve the specific fault codes, checking the wiring and connectors for any damage, and testing the Reductant Level Sensor for proper functionality.

5. Can I still drive my Buick with the U2627 code present?

While it may be possible to drive the vehicle with the U2627 code present, it is recommended to address the issue promptly to prevent potential damage to the emissions system and ensure optimal engine performance.

6. How can I repair the U2627 code in my Buick?

Repairing the U2627 code may involve replacing the Reductant Level Sensor, repairing any damaged wiring or connectors, or reprogramming the Reductant Control Module to restore communication with the sensor.

7. Will resetting the trouble codes make the U2627 code go away?

Resetting the trouble codes may temporarily clear the Check Engine light, but if the underlying issue causing the U2627 code is not addressed, the code is likely to reappear once the vehicle is driven and the system performs self-tests.

8. Is the U2627 code a serious issue in a Buick?

While the U2627 code may not cause immediate drivability issues, it is important to address it promptly to ensure proper functioning of the emissions system and prevent potential long-term damage to the vehicle.

9. Can a DIY enthusiast fix the U2627 code in a Buick?

Depending on their experience level, a DIY enthusiast may be able to diagnose and repair the U2627 code by following repair guides and using the necessary tools. However, professional assistance may be needed for more complex repairs.

10. How can I prevent the U2627 code from recurring in my Buick?

To prevent the U2627 code from recurring, it is important to perform regular maintenance on the vehicle's emissions system, address any issues promptly, and follow the manufacturer's recommended service schedule.