U2628 Code - Reductant Control Module Lost Communication With Reductant Concentration Sensor
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Reductant Concentration Sensor, Reductant Concentration Sensor harness is open or shorted, Reductant Concentration 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
- U2628 indicates Reductant Control Module Lost Communication With Reductant Concentration Sensor.
- Common causes
- Common causes include Faulty Reductant Concentration Sensor, Reductant Concentration Sensor harness is open or shorted, Reductant Concentration 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.
Code U2628 Description
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received.
What are the Possible Causes of the DTC U2628?
- Faulty Reductant Concentration Sensor
- Reductant Concentration Sensor harness is open or shorted
- Reductant Concentration Sensor circuit poor electrical connection
- Faulty Reductant Control Module
How to Fix the DTC U2628?
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 U2628 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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Get the U2628 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U2628 Buick — Reductant Control Module Lost Communication With Reductant Concentration Sensor
- U2628 Cadillac — Reductant Control Module Lost Communication With Reductant Concentration Sensor
- U2628 Chevrolet — Reductant Control Module Lost Communication With Reductant Concentration Sensor
- U2628 GMC — Reductant Control Module Lost Communication With Reductant Concentration Sensor
Frequently Asked Questions about U2628 Code
1. What are the common symptoms of OBDII code U2628?
The common symptoms of code U2628 include the check engine light illuminating on the dashboard, reduced engine performance, and potential issues with the vehicle's emissions system.
2. What causes the OBDII code U2628 to appear?
This code typically appears when there is a communication failure between the reductant control module and the reductant concentration sensor. This can be caused by wiring issues, a faulty sensor, or a malfunctioning control module.
3. How can I diagnose the cause of OBDII code U2628?
To diagnose the cause of code U2628, you can start by checking the wiring connections between the reductant control module and the concentration sensor. You can also test the sensor and control module for proper functionality using a diagnostic tool.
4. Can I drive my vehicle with OBDII code U2628?
It is not recommended to drive your vehicle with a pending or active U2628 code, as it can lead to further damage to the emissions system and potentially affect the vehicle's performance. It is best to address the issue promptly.
5. How can I repair OBDII code U2628?
Repairing code U2628 may involve replacing the reductant concentration sensor, repairing any damaged wiring, or replacing the reductant control module. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.
6. Will resetting the trouble codes make OBDII code U2628 disappear?
Resetting the trouble codes may temporarily clear the U2628 code, but if the underlying issue causing the communication failure between the control module and sensor is not addressed, the code is likely to reappear.
7. Is OBDII code U2628 a serious issue?
Code U2628 is considered a moderate issue that should be addressed in a timely manner. Ignoring this code can lead to potential problems with the vehicle's emissions system and may cause the vehicle to fail an emissions test.
8. Can a DIY enthusiast fix OBDII code U2628?
While some DIY enthusiasts may have the skills to diagnose and repair issues related to code U2628, it is recommended to seek professional help, especially when dealing with intricate components like the reductant control module and concentration sensor.
9. How much does it cost to repair OBDII code U2628?
The cost of repairing code U2628 can vary depending on the specific cause of the issue, the parts needed for replacement, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics.
10. How can I prevent OBDII code U2628 from appearing again?
To prevent code U2628 from reappearing, it is essential to address any underlying issues promptly, perform regular maintenance on the vehicle's emissions system, and ensure proper wiring connections between the control module and sensor. Regular vehicle inspections can also help catch potential problems early.
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