U2628 Cadillac 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 Cadillac 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 Cadillac 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 Cadillac?
- 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 Cadillac?
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 Cadillac 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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Frequently Asked Questions about U2628 Cadillac Code
1. What are common symptoms of OBDII code U2628 in a Cadillac related to the Reductant Control Module?
- Common symptoms include the check engine light illuminating, decreased fuel efficiency, and potential issues with the vehicle's emissions system.
2. What can cause the Reductant Control Module to lose communication with the Reductant Concentration Sensor in a Cadillac?
- Possible causes include wiring issues, a faulty sensor, a malfunctioning control module, or a software glitch in the vehicle's computer system.
3. How can I diagnose the problem related to code U2628 in my Cadillac?
- A diagnostic scan tool can help pinpoint the exact cause of the communication loss between the Reductant Control Module and the Reductant Concentration Sensor.
4. Is it safe to continue driving my Cadillac with OBDII code U2628 present?
- It is generally not recommended to drive the vehicle with this code as it can lead to increased emissions, reduced performance, and potential long-term damage to the vehicle's emissions system.
5. Can I repair the communication issue between the Reductant Control Module and Reductant Concentration Sensor myself?
- While some basic troubleshooting steps can be taken, resolving this issue may require advanced diagnostic equipment and expertise, so it is advisable to consult a professional mechanic.
6. How much does it typically cost to repair OBDII code U2628 in a Cadillac?
- The cost of repair can vary depending on the exact cause of the communication issue, but it may involve replacing the sensor, repairing wiring, or reprogramming the control module, potentially ranging from a few hundred to over a thousand dollars.
7. Are there any preventive measures to avoid encountering code U2628 in my Cadillac?
- Regular maintenance checks, including monitoring the condition of sensors and wiring related to the emissions system, can help prevent issues that may trigger this code.
8. Will resetting the check engine light make OBDII code U2628 disappear permanently?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the communication loss is not addressed, the code is likely to reappear.
9. Can a faulty Reductant Concentration Sensor cause other problems in my Cadillac?
- Yes, a faulty sensor can lead to incorrect readings and affect the vehicle's emissions system, potentially causing performance issues and triggering additional trouble codes.
10. How long does it usually take to repair OBDII code U2628 in a Cadillac?
- The repair time can vary depending on the exact cause of the issue, but it may range from a few hours to a full day, especially if diagnostic steps and part replacement are involved.
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